ac - What do the letters W, Z and G stand for on an extension cord

G seems to be obviously (G)round, but I have no idea which of the others is Neutral and which is Hot.

This AC WORKS brand extension cord [1030PR] is very durable. The extension cord comes in 10, 25 and 50 ft. in length. It is a NEMA 10-30P to a NEMA

25 ft. STW 10/3 30 Amp 3-Prong Dryer Heavy Duty Thick Extension Cord

Use the Certified Appliance 15-0303 Appliance Extension Cord as an easy and convenient way to extend the length of your appliance power cord up to 3

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This AC WORKS brand protective adapter [S1050CB620] is a heavy-duty household adapter cable. This 1.5-foot cord is a NEMA 10-50P to NEMA 6-15/20R. The

AC WORKS 1 ft. 50 Amp 3-Prong Welder/ Range/ Dryer Plug to 6-15/20 Outlet with 20 Amp Breaker S1050CB620 - The Home Depot

What's the Difference Between Type W & Type G Power Cables?

AC WORKS 20-ft 14/3-Prong Indoor Sjtw Light Duty General Extension

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What are the Letters on an Extension Cord