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Electrical Drawings & Symbols

These are quick start videos about reading,understanding and interpreting electrical drawings & symbols.

Part 1 is the introduction video for all 4 pages of these electrical drawings series. Through out the series I recap the precious videos so that you can have a reference to other [click to continue…]

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This video should help you understand article 210.4 a,b,c,d about multiwire branch circuits.

The main reason for the code would be to help protect service personal while working on the circuits.

Another reason to pull in separate neutrals vs using a common trip handle is that when rewiring a building [click to continue…]

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 25 HP Electric Motor Basic Control wiring:

This is the very basics of wiring a 25hp motor to be controlled by the car wash operator or by a customer. The customer has a momentary contact push button

that allows the motor to run a at preset time duration.The video does [click to continue…]

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Power Sources

 

Power supplies common in the US

Here are some common power supplies for residential and commercial buildings.

In the feild as an installer the term 277/480 is referred to as high voltage and 120/240/208 as low voltage. Generally speaking that is.

48 volts and below [click to continue…]

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Hole Saws-Knock Out Set -Unibits-Step Drill Bits

 

This is part 1 of 2 videos showing several methods of making holes in metal cabinets,boxes and even plastic for electrical conduit and fittings.Hole Saws-Knock outs -Unibits-Step Drill Bits are used.When doing electrical wining installs these tools can be beneficial to get [click to continue…]

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