#100 AMP WIRE SIZE CALCULATOR CODE#

You want to pass your inspection first time around but without spending more money and time than you have to. The following calculator calculates the voltage drop, and voltage at the end of the wire for American Wire Gauge from 4/0 AWG to 30 AWG, aluminum or copper wire. You need good advice before making electrical mods. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60☌ through 90☌ (140☏ through 194☏), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30☌ (86☏). My friends here in PM wish you well and would never knowingly mislead you but few of us (including me) are electrical professionals. While this is presented in tables, an informed judgement is still required.

#100 AMP WIRE SIZE CALCULATOR CODE#

OTH a 100 Amp service is defined by the breaker and the conductors it feeds have to meet code requirements for Ampacity, conduit fill, insulation, placement in construction, max ambient air temp, and other factors. In electrical practice the overcurret protection is intened to protect the conductors it feeds not the power consuming equipment. What is the size of 3 phase power cable The size of a 3-phase power cable varies based on factors like current, voltage, and distance. #4 may be technically adequate for your immediate application for a 100 Amp service for equipment that's seldom run to capacity but when feeding a pump or a heater for example #4 may not be suitable. For a 100 amp 3-phase load, you might need cables around 3 AWG or 4 AWG, depending on the specific application, distance, and local regulations. Look up accaptable ampacity in the NEC and your local code for your application.

They're satisfactory in most situatations but not always suited to every application. Remember NEC and local code represents minimum standards. Then consider conductor size and conduit size.

Some jurisdictions require upgrading of the branch circuit or sometimes even the whole system if any parts is sub-code. Maybe not in Wisconsin but certaily in warm climates. Some jurisdictions have more stringent requirements for conductor ampacity and other electrical minutia.

100 amp wire size calculator