electrical supervisor

13 essential tools for electricians

Tool kits are the electrician’s faithful companions. They are present on every assignment and their reliable content serves to accurately and safely apply the hard-earned skills. However, with all the tools that electricians have to choose from these days, finding the right one can be difficult. In our guide, you can read which really every professional must have with them.

tools for electricians

1. Stripping tool

Stripping tools are used to easily remove the insulating outer sheath of cables in order to attach terminals or plugs to the inner wire by crimping or soldering. Some wire strippers also allow electricians to cut directly through the copper or wire in a cable.

Types of stripping tools

Wire strippers are also known as wire strippers. However, many other styles are available including:

Wire strippers are also known as wire strippers. However, many other styles are available including:

Adjustable Wire Stripper – these handy tools are particularly useful for irregular wire diameters and gauges.
Triple Action Wire Stripper – These wire strippers are designed for heavier gauge wire with heavy-duty insulation and are designed to perform rotary, linear or spiral cuts.
Wire Strippers – these feature V-shaped wire strippers for thicker, multi-wire cables.
Rotary Cutters – These are ultra-compact wire strippers that use a rotary motion for a clean cut.
stripping gun – thanks to their self-adjusting blade, these tools are particularly easy to use.
Semi-Automatic Wire Strippers – use a mechanism to strip insulation with a single squeeze of the handles, quickly cutting through the wire.
Manual Wire Strippers – are among the standard hand-operated models, but typically include a spring-loaded handle and safety latch.
Steel Armor Wire Strippers – This model is designed for use with copper, steel or aluminium sheathed cables. Click here for electrical training

Other designations:

⦁ wire stripper
⦁ Cable stripping tool

Insulated (VDE) screwdrivers

Screwdrivers are one of the most traditional tools and are still essential for most electricians as they often need access to screw-capped enclosures. Multiple sizes and shapes are available to accommodate the wide variety of screw types.

Screwdrivers work through the simple application of torque – turning force – transmitted through the head of the screwdriver to a mating slot on the screw. Electrician’s screwdriver features specially insulated handles that ensure electrical protection resistance. This is indicated by the VDE test mark of the association for electrical engineering, electronics and information technology. Insulated screwdrivers are therefore often referred to as VDE screwdrivers.

Screw drivers are differentiated based on the blade tip (drives) and the associated screw heads (drives). The most well-known include:

Insulated (VDE) pliers

Pliers are another tool that craftsmen have had for a long time. Their versatility allows them to be used for a variety of tasks that require “torque” such as gripping, turning or cutting. Forceps greatly increase the force required for this type of movement compared to bare hands. Today they are usually made of steel to add extra strength to the grip of the jaws. Like screwdrivers, insulated pliers for electricians often carry a VDE test mark.
Types of insulated pliers
Pliers in different designs are available for various special activities. These include: Needle

nose pliers-These have long, tapered jaws, making them ideal for gripping small objects.
Combination pliers– These are characterized by their multifunctional shape, which combines wire cutting, stripping and gripping in a single tool.
Water Pump Pliers – Also known as adjustable pliers (among other names), these tools feature a moveable lower jaw that allows the jaws’ span to be adjusted to the desired measurement. They are ideal for use with nuts, bolts and fasteners.
wire cutter– These tools are typically used to cut wire, hence they are also known as wire cutters. A variant called the diagonal cutter applies different surfaces to the cut wire.
Grip pliers -These have a locking function that leaves both hands free to work

Pliers are ideal for:

⦁ grass
⦁ rotate
⦁ to cut

Electrical tape

Electrical tape is used to protect wires or other electrically conductive objects from external environmental influences. It is self-adhesive, abrasion-resistant, heat- and moisture-resistant and thus protects the sensitive, conductive core within the electrical cables. There are a number of different materials that electrical tape is made from, including PVC, vinyl, copper foil, and glass cloth. There are different versions, which differ in colour, width, thickness, temperature tolerance, adhesive strength and insulating ability. The colours also make it easy to choose the right type and also allow electricians to colour code the cables they are working with. Black is arguably the most common colour, both for general insulation and to mark the low voltage neutral wire in a circuit.

Hand saws and hacksaws

Hand saws and hacksaws are fine-toothed saws that are primarily intended for cutting through metal. The thin blades are held taut in an adjustable frame between the saw head and the handle. Should the blade break or become blunt, it can be easily replaced at any time.

Cable cutters

Cable cutters should also not be missing in any electrician’s tool kit! These versatile tools feature steel blades that cut through standard wiring with ease. Stronger cable cutters are even able to cleanly cut even thicker cables. They can also be used to quickly strip the insulation before crimping and similar work in no time at all. Different models allow for different types of cuts, from simple multi-purpose tools to those specifically designed for flush cutting or bevel cutting. Insulated Wire Cutters are suitable for use with high voltage power lines, electrical equipment and high electrostatic discharge environments, making them essential for electricians. For ease of use, you should look for models with an ergonomic handle and use cable cutters that are really suitable for the hardness of the material to be processed. The cutting capacity, which ranges from 0.4 mm to 600 mm, provides information about this.


Wrenches will almost certainly be an essential addition to your electrician’s tool kit, especially if you regularly need to loosen or tighten nuts, bolts or similar fasteners.
The variety of sizes of nuts and bolts requires a similar variety of wrenches to ensure a truly tight fit between the head applying the torque and the fixture in question.

Common wrench types include:

Adjustable wrenches -As the name suggests, these feature a movable jaw that can be adjusted to accommodate different sized bolts or nuts. The English man is the best-known form of the adjustable key. Open End Wrenches -These wrenches have different sized crescent-shaped clamps on each end and are useful in tight spaces

Voltage tester

Absolutely indispensable: With the help of voltage testers or “multimeters” you can check whether current is flowing through a line. They are primarily used for safety purposes when checking cables, switches, junction boxes or similar devices; if the voltage is present, the diode lights up. In this case, electricians must switch off the power before starting work, otherwise, there is a risk of death.

Most models with a voltage display have additional circuitry and overvoltage protection for increased safety.

Safety knives

Safety knives aren’t just a professional speciality tool – in fact, most of us are familiar with them. But whether carpet knife, wallpaper knife or cardboard cutter: the principle always remains the same. For safety reasons, the knife blade is shielded and is only pushed out when the tool is actually needed. This in turn minimizes accidents and injuries. Some models have spring-loaded sliders that automatically retract the blade after use.

Like all tools, safety knives come in different shapes and sizes for use in specific situations. Professional safety knives for electricians usually have aluminium, plastic or steel handles, the blade itself is made of stainless steel, carbon or tool steel for the best possible cut.In addition, a blunt or broken blade can be replaced at any time.

Allen key

Every now and then one hears or reads the short form “Imbus”. What is the correct spelling now? The correct answer is: “Allen”. This is the abbreviation for the brand name Allen screw Bauer and Schaurte. Allen keys are made of steel or nickel, sometimes bronze or copper alloys. There are four main types: straight hexes, L-shaped foldable hexes, and T-handles. Straight Allen keys are inserted into screwdrivers to adapt them for hex fasteners.
L-shaped keys have identical heads at two ends of different lengths. The asymmetrical shape results in a different leverage effect depending on the end use: If the shorter end is used for turning, less force is required. The longer end, in turn, enables use in hard-to-reach angles and corners.
Last but not least, the handles of the T-handle variant are more ergonomic, so you can grip them tighter.

Claw Hammers

Claw Hammers have a head that serves two functions: one end is for hammering nails, and the other has a double steel claw for pulling nails out. For electricians, claw hammers are quite handy tools, allowing them access to tightly locked areas, such as panelled fuse boxes.


Chisels are another tool that has been used since ancient times – who would have thought that even electricians could use them! Whether wood, stone, brick, concrete or other hard materials, a chisel breaks through all of these with ease. On these, it gives access to electrical wires or can be used to chisel channels for wiring in walls. Modern chisels are made from different steel alloys.

Available sizes include:

⦁ 5mm
⦁ 10mm
⦁ 16mm
⦁ 18mm
⦁ 20mm
⦁ 50mm


Flashlights are another household staple that is essential for electricians and other professionals. They come in many different styles, with professionals preferring smaller flashlights that use LEDs instead of traditional incandescent bulbs – after all, they’re lighter and easier to carry, so you always have a light with you. Because electricians often have to work in darkened areas, such as in a building where the lights are out or the power is off, flashlights are still essential. Helmet-mounted or headband-mounted headlamps may be necessary when electrical contractors need two free hands for precision work.

Frequently Asked Questions

What tools do master electricians and trainees need?

There is no general answer to this question because it depends on the type of activity. However, the basic equipment of every electrician certainly includes:

⦁ Appropriate insulating tape
⦁ Insulated screwdriver
⦁ Insulated pliers
⦁ wirecutter
⦁ voltage tester

Which are the best cordless screwdrivers?

Electricians should always use screwdrivers that are also fully insulated to avoid the risk of electric shock. Look for tools that meet the quality standards of the German Association for Electrical, Electronic & Information Technologies (VDE).
In principle, this also applies to all other tools used by electricians.

How much do electrician tools cost?

RS Components are an international distributor of quality equipment and can offer expert advice on all your toolbox needs and even custom tool kits and bags if required. Of course, it’s not necessary to buy a complete kit – your equipment can also grow over time and you can buy additional tools whenever your finances allow and the job requires it.

Electricity Effects on people

The human body conducts electricity. Very small currents are harmless and are e.g. B. used in medicine. However, larger currents can lead to injuries and even death. Therefore, humans must fundamentally protect themselves from the dangerous effects of electric current.

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Current in Human body

The human body conducts electricity. Body fluids are responsible for their conductivity. In contrast to metals, the electrical current is conducted by ions. In contrast to metals (first-order conductors ), such conductors are called second-order conductors.

Very small currents in the range from microamps to one milliampere are harmless and are used eg B. used in medicine (eg stimulation current diagnostics and therapy).

Larger electrical currents flowing through the body can injure or even kill people.
The effect of electric current on humans depends

  • the strength of the current through the body,
  • the type of current (direct current, alternating current, high-frequency alternating current),
  • from the current path through the body,
  • on the duration of the action of the electric current.
Danger of Electricity

Caution! High voltage. There is a danger to life.

The most important current paths through the human body are shown in Figure 2. Direct currents and alternating currents that flow over the area of ​​the heart (eg from hand to hand) are particularly dangerous. They can influence the heart’s activity, lead to cardiac arrest and thus death. Larger currents can also cause burns.

Investigations have shown that the human body resistance in the current paths shown in Figure 2 is around 1500 ohms on average. In addition, there is a contact resistance of around 1000 ohms between the skin and the voltage source with which one comes into contact. The average total resistance is thus around 2500 ohms.
If the voltage is 25 V, a current of


I= 25  V / 2 500 Ω

I= 0.01  A = 10  mA

Such a current of 10 mA is not yet life-threatening, but you can usually feel its effects clearly.

Investigations on test persons with alternating current of 50 Hz showed the following typical effects of electrical currents for the hand-hand current path :

2 mAElectricity just noticeable in the palms of the hands
3 mAslight tingling sensation in the palms of the hands, as if the hands were asleep
4.5 mASlight vibration of the hands, pressure in the wrists
8 mAHands become stiff and cramped
15 mAGeneral spasm of the arm muscles reaching up to the armpits is
just possible to let go
16.5 mAComplete cramping of the hands and arms, it is no longer possible to let go, severe pain occurs.
over 40 mAand exposure times of more than 2 seconds:
ventricular fibrillation, death likely with increasing perfusion time.

current transformers

Worth knowing – current transformers

Current transformers are special transformers for the proportional conversion of large currents to directly measurable values. A current transformer achieves galvanic separation between the primary circuit and the measuring circuit and, in the event of a malfunction, provides a protective effect for the downstream measuring devices. Current transformers are mainly used where currents cannot be measured directly
A current transformer converts a high primary current into an electrical signal that is easy to process. Such a current transformer emits a secondary current of milliamps up to a few amps (usually 1A or 5A) as an output signal. The secondary current is essentially proportional to the primary current.
There are different versions of current transformers for all voltage levels for use in the power grid. These have different characteristics depending on the application:

⦁ For measuring purposes, to generate a current that is reduced as proportionally as possible within the measuring range for energy meters, current measuring devices and universal measuring devices. Such converters protect themselves and the connected measuring devices from overcurrent by going into saturation.
⦁ for protection purposes, for the transmission of a reduced current to protection relays, control and regulating devices. Such converters deliver an output signal that is dependent on the primary current even with a high overcurrent.

Connect the current transformer correctly

The connections of the primary winding are marked with the capital letters “K” and “L” or “P1” and “P2”. The polarity has to be done in such a way that the “energy flow” flows from K to L or from P1 to P2. The connections of the secondary winding are with the lower case letters “k” and “l” or “s1” and “s2”. The polarity has to be done in such a way that the “energy flow direction” runs from K to L.
If the connections S1 and S2 are interchanged, this will lead to incorrect measurement results.

The correct determination of the power of a current transformer:

When determining the power of the current transformer, the type of connected measuring devices and the length and cross-section of the power must be taken into account. The power required by the current transformer results from the power requirements of the measuring devices and the cable.
A current transformer with a VA output that is too low, overloads, cannot maintain the class accuracy and the measurement error increases.

In the example given, you have a power requirement of approx. 3.8 VA. This is made up of the internal consumption of the lines, here eg 3VA and the internal consumption of the ammeter of 0.8VA. In order to maintain the class accuracy, the internal consumption of the measuring devices/lines should be in the range of 25 to 100% of the converter power. With the rated power of the selected current transformer, we are in this range with 5VA.

A brief overview of the power consumption of Cu power cables:


Avoid open operation of the current transformer

A current transformer operated openly on the secondary side induces very high voltage values ​​on the secondary side. This voltage level can reach values ​​of up to a few kilovolts and thus represents a great danger for people and the system.
Therefore, the secondary circuit should be opened under no circumstances as long as the current is flowing in the primary circuit. The open operation must be avoided and the converters must be short-circuited at the secondary terminals when connecting/exchanging measuring devices.

Accuracy classes

Current transformers are divided into classes according to their accuracy. Standard accuracy classes are 0.1; 0.2; 0.5; 1; 3; 5; 0.1 S; 0.2 S; 0.5 S, as well as the extensions ext150 and ext 200 in classes 0.1; 02; 0.5 and 1. The class symbol corresponds to an error curve with regard to current and angle errors.

Rated current (Ipn, Isn)

The rated current is the value of the primary and secondary current indicated on the rating plate (primary rated current, secondary rated current) for which the current transformer is rated. Standardized rated currents are (except in classes 0.2S and 0.5S) 10 – 12.5 – 15 – 20 – 25 – 30 – 40 – 50 – 60 – 75A, as well as their decimal multiples and parts thereof. Standardized secondary currents are 1 and 5A, preferably 5A.
Standardized rated currents for classes 0.2S and 0.5S are 25 – 50 – 100A and their decimal multiples as well as secondary (only) 5A.

Rated power Sn

The rated power of the current transformer is the product of the rated burden and the square of the secondary rated current and is specified in VA. Standardized values ​​are 2.5 – 5 – 10 – 15 – 30 VA. Values ​​above 30 VA may also be selected depending on the application. The rated power describes the capacity of a current transformer to “drive” the secondary current within the error limits through a load.

Types of Transformers

Straight-through or window-type current transformers

The conductor to be measured (busbar or cable) is passed through the opening of the current transformer and forms the primary circuit of the straight-through transformer. Straight-through converters are mainly used for mounting on busbars. A straight-through transformer or plug-in current transformer is the most common type of current transformer. These have the disadvantage that the primary conductor has to be interrupted during installation. This is why these current transformers are mainly used when setting up new systems. 
In the case of small currents, the plug-in current transformer can be used as a thread-through current transformer for smaller currents for reasons of cost. The primary line is passed through the current transformer several times. The nominal primary current to be measured is reduced accordingly.

Folding transformers (divisible current transformers)

If current transformers have to be retrofitted, conversion current transformers are often used. With these converters, the converter cores can be opened during installation and thus mounted around the bus bars. This enables assembly without interrupting the primary conductor.  

Winding current transformer

Winding current transformers or winding transformers have a primary winding for smaller currents of 1 to 40 A.

Protection converter

While measuring transformers should go into saturation as quickly as possible above their use current range (expressed by the overcurrent factor FS) in order to avoid an increase in the secondary current in the event of a fault (eg short circuit) and thereby protect the connected Devices, protection transformers are required to be as far outside as possible lying saturation.
Protection converters are used for system protection in connection with the corresponding switching devices. Standard accuracy classes for protection transformers are 5P and 10P. “P” stands for “Protection”. The nominal overcurrent factor (in%) is placed after the protection class designation. For example, 10P5 means that with five times the nominal current, the negative secondary-side deviation from the corresponding ratio (linear) to the expected value is a maximum of 10%.

Current transformer – measuring transducer

technology The advantages of the 4… 20 mA current signal are increasingly recognized and appreciated. With this signal, a base current of 4 mA is the zero value and the 20 mA signal is the 100% value. In addition to the general advantages of the current signal, a current of less than 4 mA can be used as an error signal.
The particular advantages of the 4 … 20 mA signal are always evident when the transmitter is a device that works on the  2-wire principle.
The 4 … 20 mA signal, which is also called the current loop, allows the power supply and signal evaluation to be carried out with only 2 wires. The transmitter is constructed using a special circuit technology in which the 4 mA base current is used to supply the converter.
With these transducers, the auxiliary power for the internal components of the device, such as the transducer amplifier, in particular, is drawn from the signal current.

Features of the DC generator

In all types of generators, the field windings, the armature windings and the external load circuit are connected in series, as shown in the figure below.

wound generator series

Therefore, the same current flows through the armature winding, the field winding and the load.
Let, I a = I sc = I large
Here I a = armature current
sc = current field field
large = load current
There are generally three most important characteristics of a DC generator that show the relationship between different quantities, such as series field current or excitation current, generated voltage, terminal voltage and load current.

Magnetic or Open Circuit Characteristic of DC Series Wound Generator

The curve showing the relationship between the no-load voltage and the magnetic field or magnetic or open circular curve is displayed. As they are not charging, the load terminals are open and there will be no field current in the field as the armature, field and load are connected in series and these three make a closed circuit loop. Thus, this curve can be practically achieved to separate the field winding and excite the DC generator from an external source.

Here in the diagram below the AB curve shows the magnetic characteristic of the DC generator. The linearity of the curve will continue until the poles are saturated. After this, there will be no other significant change in the DC generator terminal voltage to increase the field current. Due to the residual magnetism, there will be a small initial tendency along with the reinforcement and therefore the curve started from a point A which is a little above the origin O.

Internal feature of DC series wound generator

the internal characteristic of the curve gives the relationship between the voltage produced in the armature and the load current. This curve is obtained by subtracting the drop due to the diamagnetic effect of the reinforcement reaction from the no-load voltage. Thus, the actual voltage produced (E sol ) will be less than the voltage without load (E 0 ). This is why the curve falls slightly from the typical open circuit curve. Here in the diagram below the OC curve shows the internal characteristic or the total characteristic of the DC generator.

External feature of the DC generator

The external characteristic curve shows the change in the terminal voltage (V) with the load current (I large ). The voltage of the terminal of this generator type was obtained by removing the ohmic drop due to the armature resistance (R a ) and the series field resistance (R sc ) from the actual output voltage (E sol ).
Terminal voltage V = E sol – I (R a + R sc )
The external characteristic curve is below the internal characteristic curve because the value of the terminal voltage is less than the output voltage. Here in the figure, the OD curve shows the external characteristic of the DC generator.

characteristic curves of a direct current generator

It can be observed from the characteristics of the DC generator, that as the load increases (load is increased when the load current increases) the voltage at the machine terminal increases. But once it reaches its maximum value, it begins to decrease due to the excessive demagnetizing effect of the armature reaction. This phenomenon is shown in the figure from the dashed line. The square part of the feature gives approximately constant current regardless of the external load resistance. This is because if the load increases, the field current increases as the field are connected in series with the load. Similarly, if the load increases, the armature current increases as the armature also connect to the load. But due to saturation, there will be no further increase in the magnetic field strength, hence any further increase in the induced voltage. But due to the increased armature current, the effect of the armature reaction increases significantly, which causes a significant drop in the load voltage. If the load voltage drops, the load current also decreases proportionally, as the current is proportional to the voltage according to Ohm’s law. Thus, by increasing the load, it tends to increase the load current, but by decreasing the load voltage, it tends to decrease the load current. Due to these two simultaneous results, there will be no significant change in the load current in a dashed portion of the outside Thus, increasing the load, tends to increase the load current, but decreasing the load voltage, it tends to decrease the load current. Due to these two simultaneous results, there will be no significant change in the load current in a dashed portion of the outside Thus, increasing the load, tends to increase the load current, but decreasing the load voltage, it tends to decrease the load current. Due to these two simultaneous results, there will be no significant change in the load current in a dashed portion of the outside characteristics of the DC generator. This is why the DC series generator is called a constant DC current generator.

What is a short circuit?

In electricity, the notion of short-circuit comes up very often. Usually associated with danger, shorting is something you want to avoid. But by the way, do you know what a short circuit is? What happens from an electrical point of view during a short circuit? Find out the answers to these questions in our short circuit guide.

short circuits
short circuits

The definition of a short circuit

Principle of short circuit
In electricity, a basic circuit is represented by a generator (battery, battery, etc.) which supplies current to devices (dipoles) such as a lamp, a capacitor etc. When the circuit is closed, the current leaves from its source and passes through the equipment before returning to the generator.
In the event of a short circuit, the current takes a shortcut. Instead of passing through the circuit equipment, it returns directly to its source. In other words, the current becomes trapped in a loop that causes the intensity to increase and heat up. A short circuit can be accidentally caused when a connecting wire strikes its insulating plastic sheath. It can also be caused by inserting a jumper wire between the terminals of the generator or dipole.
An example of an electrical short circuit
Take the example of an electrical circuit comprising a generator and three bulbs connected in series. In normal times, the current leaves the generator and successively feeds the three bulbs. If one of the bulbs is short-circuited, the current will no longer flow through this dipole. As a result, the current will only feed two lamps. Concretely, this means that the short-circuited lamp will not light up. On the other hand, because of the short circuit, the other two lamps will shine brighter and run the risk of burning out. To learn more details about short circuits click here

The different types of short circuits

There are different types of short circuits. They can be classified according to different parameters. For example, considering the duration, we will speak of a self-extinguishing, fugitive, semi-permanent or permanent short-circuit.
The cause of the short circuit can also vary. In the event of a broken conductor, we will speak of a mechanical short-circuit. This is the case, for example, if you forget a tool that connects the terminals of your car battery. The short circuit can also come from an electrical surge after a lightning strike, for example. Finally, humidity, ageing or degradation of the insulation can also be responsible for a short circuit.
Finally, the nature of the connection makes it possible to qualify a short-circuit. For example, a short-circuit is said to be “free” during direct contact between the two terminals, unlike a so-called “impedance” short-circuit. For a three-phase network, short circuits can be:
Single-phase in the case of one phase with neutral;
Biphase for two phases;
Three-phase for three phases;
Two-phase-earth when two phases are connected with the earth.

The short circuit from the point of view of theory

Another way to understand what a short circuit is is to go back to the fundamentals of electricity from a formula point of view.
Ohm’s law in direct current dictates that the voltage (U) is equal to the product of the resistance (R) and the current (I): U = R * I. The resistance reflects the property of a component to oppose the passage of a current. For example, a bulb has a certain resistance. During a short circuit, the component is bypassed by the current. Nothing (or almost) then opposes the flow of current and the resistance of the circuit tends to zero. Therefore, the intensity increases towards infinity.
The increased intensity causes heat dissipation via the Joule effect. This conforms to the following formula: P = R * I², where P represents the power dissipated by the Joule effect.
In short, a short circuit causes the current to rise sharply, causing the circuit to heat up. This is why short circuit phenomena must be able to be detected early and corrected. Otherwise, you risk damaging your circuit. Adding heat can cause the insulation covering your equipment to melt and burn out. On a larger scale, the short circuit can be responsible for household fires.

How to protect your electrical installation against short circuits?

Considering the dangers of a short circuit, there are different pieces of equipment to protect the electrical installation of a home.

The electric circuit breaker

The circuit breaker is an electromagnetic device that automatically cuts off the current when a short circuit is identified. The circuit breaker can be thermal or differential. Once the problem has been eliminated, the circuit breaker can be reset.
Circuit breakers are widely used in a home. This is how you have a branch circuit breaker installed next to the GFCI on a row in your electrical panel. The role of this circuit breaker is to protect a given circuit against short circuits or overloads. A subscriber circuit breaker is also installed upstream of your electrical panel in the technical shaft of the accommodation. Its role is to provide the interface between the general electrical network and your personal installation. Only the electricity supplier is authorized to operate this circuit breaker.

The basics of electricity

Installation, replacement of electrical circuit breaker
The electric fuse
The electric fuse works on the same principle as a circuit breaker. In the event of a short circuit or an electrical overload, it automatically cuts off the power. The main difference with a circuit breaker is that the fuse cannot be reset. It must therefore be replaced after each use. A fuse is in fact made up of a piece of metal (lead for old fuses) that melts during a short circuit or overload. Once the filament is melted, electricity cannot pass through. Compared to circuit breakers, fuses are cheaper and allow circuit overloads to be detected more quickly.


Grounding outlets, equipment and the circuit is also a means of protection against short circuits. Earthing concretely consists in creating a physical connection with the ground. In the event of a short circuit, the current is therefore automatically diverted to the ground.

How can I become an electrical supervisor?

You can become an electrical supervisor with a combination of education, training and field experience. Since electrical supervisors oversee the work of others, it is necessary that they have a full grasp of the work and the skills required to perform the job. Other personality characteristics are also needed, such as the ability to lead others, good communication skills, and time management. A license is required in some states, but this may vary from location to location.

A high school diploma is required to become an electrical supervisor. Beyond that, an apprenticeship program is necessary to become an electrician. This program generally lasts four years. Upon completion of the apprenticeship, on-the-job training is required, as well as some supervisory work experience. An electrical engineer can also become an electrical supervisor, which requires at least an undergraduate degree in electrical engineering. Graduate studies in electrical engineering offer an advantage when hiring for these positions, but is not always necessary.

Electrical Supervisor
Electrical Supervisor

The skills needed to become an electrical supervisor include a thorough knowledge of the tools and equipment used by electricians, as well as an understanding of electrical codes and standards. An electrical supervisor should know how to do the job himself if there is a problem with those supervised. Experience solves this problem for most electrical supervisors, as it is necessary to work in the field for several years before moving to a supervisory role in an organization. Continuing education is also important throughout a career in order to stay current with the latest techniques and equipment to get the job done.

Good communication skills are essential to becoming an electrical supervisor. The supervisor must be able to communicate with employees and management, both verbally and in writing. Leadership skills, including creating a positive atmosphere, motivating others, and dealing with conflict, are also extremely useful skills. The desire to take on a leadership role is also important because the job has more responsibility than other positions in the field.

In some states, a license is required to become an electrical supervisor. Individuals can consult the professional licensing service of the government in their region for specific qualifications required. Organizations often help individuals obtain a license so that they can legally operate within the company. Licensure often includes a certain number of hours on the job and meets educational requirements.

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