Extension Cord Polarity

The larger prong connects to neutral.

Extension cord polarity. Make sure there are no signs of shorting. On cords of this type the larger prong connects to the neutral wire. 6ft 1 8m polarized us 2 prong male female extension power cord cable 2 outlet extension cable cord us ac 2 prong male female power cable10a 125v nema 1 15p to 1 15r cable polarity 4 6 out of 5 stars 64. Use cords that are white translucent yellow brown or black avoid obvious i hacked an extension cord colors like dark green.

Lamp cords with pre molded plugs can be readily had from a proper electrical supply mcmaster carr or by hacking an extension cord of appropriate gauge typically 18 awg unless it s one heck of a lamp. A polarized power cord has prongs of different sizes. Check the polarity and continuity between the plug and the jack. Slide and screw the plastic sheath back into position.

Some three prong plugs are also polarized and when they are the same rule applies. If the end has one prong larger than the other the larger one is negative. Check the voltage and polarity at the extension plug before use. You can only use a polarized plug with a polarized outlet.

Connect the extension cable to the power supply and plug the power supply into an ac outlet. On a polarized grounded cord the smaller prong connects to hot and the semi rounded pin underneath the two prongs connects to ground.