Easy Wiring Question


Old 07-05-18, 08:43 PM
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Easy Wiring Question


I know my way around basic outlet wiring but I just want to confirm this prior to purchasing some electrical cable.

I bought a surge protector for my home -- it is an Intermatic IG2240-IMSK. I read the installation instructions and know I need 10 gauge wire with 4 leads. I also know I need a 2 pole - 30 amp breaker. Wiring this up seems pretty easy but I wanted to confirm:

Is 10 gauge - 4 lead wire the same as 10/3? The wiring instructions call for 2 black, a white, and a green. In 10/3 - isn't the 4th lead a red wire? Not sure if this matters or not? Are the instructions indicating I could get a 10/2 wire and buy a separate black wire for the 4th lead?

In addition, what does it mean that maintain a 4" wire bend radius? I plan on this being a straight line lead with no bends so I don't think I'll have issue here.

Thanks for your help. The PDF instructions are found at the link below. Any tips would be helpful.

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Old 07-05-18, 09:02 PM
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Yes.... you can use 10/3 NM w/ground.

Usually a unit like that is connected directly to the side of the panel with a straight or offset nipple and then short pieces of wire are used to connect it. The wiring needs to be as short as possible for maximum effectiveness.
Old 07-06-18, 12:58 PM
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So to confirm, the black wire as illustrated in the installation instructions is only meant to indicate "hot wire". If I were to get a 10/3 wire (1 ft or less), I'd connect one black to black and then red to red on the bottom side?
Old 07-06-18, 01:16 PM
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Yes, black and red are interchangeable as hot wires.
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