3 ms·
For residential, yes, but commercial is a different story. Schneider will happily sell you 90c rated equipment beyond the wire. They provide excellent guidance:
by Moto7451 3y ago
For residential, yes, but commercial is a different story. Schneider will happily sell you 90c rated equipment beyond the wire. They provide excellent guidance: https://www.productinfo.schneider-electric.com/0110db9901wiretempratetermdb/0110db9901-wire-temp-ratings-and-terminations/0110DB9901%20Wire%20Temp%20Ratings%20and%20Terminations/English/0110DB9901%20(bookmap)_0000485497.xml/$/TheNECRules-D1995BA7#EquipmentRatedFor100AOrLessNEC110.1-D1B8465D2 https://www.productinfo.schneider-electric.com/0110db9901wir...
I don’t think anyone needs shared fiber and 12ga cable in a home setting anyway.
The NEC also defers to UL and similar bodies for installations being cleared so the complexities go beyond the basic NEC guidance, especially for the exotic stuff out there.
- quickthrowman 3y agoI’m a commercial electrical project manager and I’ve never seen a spec call for 90C rated breakers. I bought dozens of panelboards last year from multiple manufacturers, including Square D. You also need equipment lugs/terminal blocks/wire nuts rated for 90C. I’m not saying 90C rated parts don’t exist, it’s just uncommon enough that you select wire based on the 75C column by default, even in a commercial setting.