Mike Dolt Enterprises
Mike Dolt Enterprises
User: Riograndeelectric, Location: Lakewood Colorado
Asked on: Thursday, March 24, 2011 at 10:59 am EDT
Answered on: Tuesday, May 14, 2024 at 3:12 am EDT
Question: I have a Early 1950s house where I am fixing the kitchen electrical that was Jerry rigged by the GC during the remodelthe House has 2 wire cloth romex with no ground.some of the cable is the thick black NM and other is cloth coverd gray NM cable.all NM cables have cloth exterior insulation with with type TW conductors.My question is what were the Temperature rating's for the cloth NM and what were the allowable ampacitys of 14-2,12-2 & 10-2Thanks.Cameron
Temperature Ratings Black NM (Romex): 60°C (140°F) Gray NM (Romex): 75°C (167°F)Allowable Ampacities14-2 NM Cable with Copper Conductors 60°C: 15 amps 75°C: 20 amps12-2 NM Cable with Copper Conductors 60°C: 20 amps 75°C: 25 amps10-2 NM Cable with Copper Conductors 60°C: 30 amps 75°C: 40 ampsNotes: The allowable ampacities are based on a single cable installed in free air. If multiple cables are bundled together, the ampacity may need to be reduced. The ampacity ratings also depend on the ambient temperature. It is recommended to use a licensed electrician to perform electrical work to ensure safety and compliance with electrical codes. Flag for review