SF6 Gas Insulated Switchgear Guide Specification

Each wire size has a NEC maximum allowed ampacity (number of amps it can safely handle) as shown in the wire chart below. If you need to install a hot water heater that will be on a 30-amp breaker what is the minimum wire size the NEC will allow? Fill in remaining wire sizes needed. Wire Size Max. Ampacity No. 14 15 No. 12 20 No. 10 30 No. 8 40 ... ................
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