User: curt swartz, Location: San Jose, CA
Asked on: Tuesday, March 15, 2011 at 7:56 pm EDT
Answered on: Tuesday, May 14, 2024 at 2:51 am EDT
Question: I was looking at the instructions for a WAC Lighting electronic low voltage transformer and the following statement got my attention. Doesn't heaver gauge wire have less resistance? I'm confused.Note: Heavy gauge wires introduce more electrical resistance to the line, which acts as an additional load to the transformer. If using 14 or 12 gauge wire do not use the maximum 60 watt load.
Yes, heavier gauge wire does have less resistance. The statement in the instructions is incorrect.Wire resistance is inversely proportional to the cross-sectional area of the wire. This means that a wire with a larger cross-sectional area (i.e., a heavier gauge wire) will have less resistance than a wire with a smaller cross-sectional area (i.e., a lighter gauge wire).The reason why the instructions state that heavy gauge wires introduce more resistance is likely because they are assuming that the wire is being used to connect the transformer to the load. In this case, the resistance of the wire will act as an additional load on the transformer, which can reduce the amount of power that the transformer can deliver to the load.However, if the wire is being used to connect the transformer to the power source, then the resistance of the wire will not act as an additional load on the transformer. In this case, the transformer will be able to deliver the full amount of power to the load, regardless of the gauge of the wire.Therefore, when choosing the gauge of wire to use for a low voltage transformer, it is important to consider the application. If the wire is being used to connect the transformer to the load, then it is important to use a wire with a large enough cross-sectional area to minimize the resistance. However, if the wire is being used to connect the transformer to the power source, then it is not as important to use a wire with a large cross-sectional area. Flag for review