12/25/2022 Why do i have colonial flex type nm 600 volts 14/2 ground cult wire in hot water baseboard heaterRead Now![]() Circuit-conductor ampacity and voltage rating for jacketed cords in general-use cord sets and power-supply cords per UL guidance Types of CordĪmpacity of Current-Carrying Conductors (amperes)ġA conductor that is used to carry an unbalanced current from the other conductors is not considered to be a current carrying conductor. Use the amp chart below to look up the rated amperage of different sizes and types of cords. NM cable is easier to cut with just a set of side-cutting pliers. In the case of Romex, a coating is added that makes the sheathing more slippery. It is easier to pull through holes in studs because of the smooth sheathing. Likewise, when the length of the cord exceeds fifty feet there is a decrease in amperage. NM wire is easier to unspool and straighten out because the PVC sheathing is pliable. ![]() When a cord has three current carrying conductors there is a decrease in amperage. The amperage rating of a cord is a function of the wire gauge, number of current carrying conductors and length of the cord.
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