Why is this OK, because it's a hard-wired device?

[donb21]

I have a ceiling fan connected to a 12 gauge wire, which comes from a 20 amp breaker. The ceiling fan has 18 gauge (or smaller) wire. In effect, 18 gauge wire is connected to a 20 amp breaker. Why is this OK, because it's hard wired?

 

[Marvo]

I'm not from the USA and I don't know the regs and standards but I'd guess it's because it's a hard wired fixed appliance therefore load can't change so there's no risk of overload. The internal wiring of appliances isn't usually considered to be part of the electrical installation so the circuit breaker would be sized according to the supply cable.

Personally with a fixed appliance on a dedicated circuit I'd install a smaller circuit breaker that's more appropriately sized for the load especially if that circuit didn't have a ground current protection device on it.

 

[donb21]

That was my guess too. The same house also has a box with three light switches, sourced with 12 gauge, then branches out to recessed ceiling light fixtures with 14 gauge; all hard wired. I've never seen wire sizes mixed that way, but I guess hard-wiring makes it OK.

 

[Megawatt]

I have a ceiling fan connected to a 12 gauge wire, which comes from a 20 amp breaker. The ceiling fan has 18 gauge (or smaller) wire. In effect, 18 gauge wire is connected to a 20 amp breaker. Why is this OK, because it's hard wired?

It’s what is called fixture wires and that 1 fan is not going to pull 20 amps. Your fan is fine and has UL stickers on them. No worries

 

[donb21]

It’s what is called fixture wires and that 1 fan is not going to pull 20 amps. Your fan is fine and has UL stickers on them. No worries

Ahh, that explains it. I did a quick look-up, there are entire discussions on fixture wire and flexible cords. Thanks for the tip.

 

[donb21]

It’s what is called fixture wires and that 1 fan is not going to pull 20 amps. Your fan is fine and has UL stickers on them. No worries

Ahh, that explains it. I did a quick look-up, there are entire discussions on fixture wire and flexible cords. Thanks for the tip.