Basic Electrical for wiring for house,wire types sizes In addition to Romex, wiring a house also requires a few larger gauge wires for high power appliances. Your air conditioner or electric stove would fall into this category. The table below list some common wire types and rated amperage for wiring a house. Standard Gauge For Household Electrical Wire - Electrical Sep 21, 2008#3. Bear in mind that nothing is "standard", except for the wire sizing requirements. What I mean is that the wire should always be sized for the circuit, whether it is a 15 amp circuit or a 60 amp circuit. Check the breaker that serves the circuit in question. As Jim said, 14 gauge is good for 15 amps and 12 gauge is good for 20 amps.