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Electrical

Electrical Material Guide


 


 

Wire

Gauge of wire Use Ampacity Maximum wattage load
1 Service entrance 125 amps 30,000 watts
2 Service entrance 95 amps 22,800 watts
4 Service entrance
Main ground
70 amps 16,800 watts
6 Main ground
240 volt appliance (range)
50 amps 9600 watts
8 Single 120 volt appliance (doubled 240 appliance; dryer or heater) 40 amps 7680 watts (240 volts)
10 Single 120 volt appliance (doubled 240 volt appliance; dryer) 30 amps 2880 watts (120 volts)
5760 watts (240 volts)
12 small appliances;
lighting
20 amps 1920 watts (120 volts)
3840 watts (240 volts)
14 lighting 15 amps 1440 watts (120 volts)
16 -22 Low voltage applications
(door bells, thermostats)


Cables

Type - characteristics Use
NM (non-metallic) sheathed cable Residential grade indoor wiring
NMC (non-metallic cable) enclosed in solid plastic Residential indoor wiring for damp locations
UF (underground feeder) Can be buried under ground
THHN/THWN
Coaxial cable carries analog signals
Telephone wire carries analog or digital signals