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Electrical Wiring

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4,935 Questions

What do MCM stand for in older electrical books?

MCM stands for 1000's circular mils. Broken down MCM means 1000's (M) of (C)ircular (M)ils. A Circular Mil means the area of a circle 1/1000 inch in diameter. 1000 MCM conductors are 1 inch in diameter.

Does electric current damage vehicle?

no because any current that is incident on the vehicle is protected by the grounding provided by the tyres.

Why do you need to wait until the surface of a soldered joint goes dull before moving it?

Yes, you should wait until you see a film cover the liquid silver colour of the connection

How do you calculate the current carrying capacity of cu strip?

Measure the width and thickness of the strip. Multiply them together to find the cross-section area, and treat it as normal wire of the same cross-section area.

For example, 10 mm x 1 mm strip would be used like 10 sq. mm cable.

What do you need to make a cordless drill motor remote controlled and spin slower with more power as you want to make a small remote controlled winch able to pull 50 lbs. about 10feet and reversible.?

Remote controlled: buy a cheap RC car and steal RC circuit from it: use circuit output to close a relay controlling the drill motor.

More power: if the drill has a torque switch, set it to the most torque (slowest speed for pull of the trigger). If not, add external gearing to accomplish this.

Great site for tinkering: mcmaster.com

Why does electricity flow through aluminum foil better?

It flows through aluminum foil better because electricity flows throw aluminum or metal better then plastic or other

What is my Led and what resistor do I need?

Led is a light emitting diodes which can two leads .one lead is larger and the other is smaller. You did't use any resistor because it glows with the small amount of energy!

Idiot. I mean't how to I find out what my LED is. I know what a Led is and without a resistor, you prick, It wouldnt last a second.

Why will people buy driverless cars?

People who are elderly, or depressed, or exhausted, and just want to stay home

and watch TV and not go anywhere, will buy driverless cars, so that the proper

level of congestion on the highway can be maintained without the hassle of

getting dressed and going out and making it happen. It is our civic duty.

What will cause a AHU go off on hi static press?

clogged air intake filters,or a faulty high pressure indicator

Is it possible to connect a Leslie speaker to a Hammond Elegante from the 1970's?

Actually, No. The Hammond Elegante was first produced in 1981. Other than that small detail then the answer is yes -- I have an Elegante 340100 which comes with its own internal Leslie simulator, but I have it connected to an external Leslie 710 too.

What are electrical sleeves used for?

In the electrical industry there are many different types of sleeves used. There are insulation sleeves, linesman's high voltage sleeves and conduit sleeves to name a few. The insulation sleeve is used for the protection of electrical conductors. Linesman's sleeves are used for extensions to the protective rubber gauntlets that they wear when working on high tension wiring systems. Conduit sleeves are used when a broken conduit needs to be repaired in situ.

How do you install a ceiling fan with red black and white wires?

Based on your description it is very likely that either the red wire or black wire is switched and the other is on all the time. In most cases the light of the fan, if it has a light, is connected to the switched wire and the fan is connected to the unswitched wire. This allows you to turn off the light while allowing the fan to remain running. There is no way to know without testing which wire is switched.

The white wire is the neutral, connected to the white, or neutral, or common conductor of the fixture. There should also be a bare or green wire in the box to connect to the ground wire of the fixture.

Why is 4 pair cable twisted?

This method is utilized to stop magnetic field inter reaction (induction) between the signals that are carried on the other pairs.

How do you reverse rotation on furnace fan motor 120 volt?

The motor connection diagram should be on the inside cover plate of the motor's junction box cover. To reverse the motor direction just reverse the starting winding leads while leaving the running windings just as they are. The starting winding numbers are sometimes numbered 1 and 4.

Does a switch have to go in a certain place to power a circuit?

If the circuit is complete then it shouldn't matter where the switch is located. All a switch is specifically is a segment of the circuit that can be connected and disconected.

Is a glass dish a conductor of electricity?

Glass in its solid state is an insulator of electricity.

How many test leads are needed to find resistance?

The test equipment needs two test leads to find the resistance in a circuit.