Lighting loads
- Thread starter clearyjr
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bphgravity
Senior Member
- Location
- Florida
Re: Lighting loads
The NEC is not a product standard. Just following the manufacturer's instructions for total load that can be served by the dimmer switch.
The NEC is not a product standard. Just following the manufacturer's instructions for total load that can be served by the dimmer switch.
allenwayne
Senior Member
Re: Lighting loads
2 900 watt loads on one dimmer better use a sizable enclosure and don`t cut the fins off to make it fit
2 900 watt loads on one dimmer better use a sizable enclosure and don`t cut the fins off to make it fit
Re: Lighting loads
I want to use a dimming module, and I don't want to be wrong when I have to explain to the architect that although a #12thhn wire can handle 1920 watts I don't know of a 2000 watt dimmer, nor would I recommend using one even if there was one.Any feed back would be appreciated.
I want to use a dimming module, and I don't want to be wrong when I have to explain to the architect that although a #12thhn wire can handle 1920 watts I don't know of a 2000 watt dimmer, nor would I recommend using one even if there was one.Any feed back would be appreciated.
john m. caloggero
Senior Member
Re: Lighting loads
The size of the wire is based on the circuit size which is the size of the fuse or circuit breaker that supplies the branch circuit. No. 12 copper conductors would be required for a 20 amp circuit.
No. 12 wire has an ampacity of 20 ampere which at 120 volts results in 2,400 watts. I assume that one 20 amp circuit will supply the two chandliers.
The size of the wire is based on the circuit size which is the size of the fuse or circuit breaker that supplies the branch circuit. No. 12 copper conductors would be required for a 20 amp circuit.
No. 12 wire has an ampacity of 20 ampere which at 120 volts results in 2,400 watts. I assume that one 20 amp circuit will supply the two chandliers.
rick hart
Senior Member
- Location
- Dallas Texas
Re: Lighting loads
The dimmer can be ran at 100% rated load- a 2000W dimmer can be used since you will only be at 90% max. Some manufactures make a 2400W dimmer, if that makes you feel better and the architect appoves of the looks. They are big and ugly. Pay attentiion to the manufactures derating for ganging, if applicable. The dimmer will feel like a small room heater when full bright so, as stated earlier, give the dimmer room to breathe around the front plate- ask about plans for fabric finish on the wall that will trap heat. Make sure that you are not sharing a neutral for the supply circuit. The dimmer will likely have a short life compared to others more suitably loaded at 80%.
The dimmer can be ran at 100% rated load- a 2000W dimmer can be used since you will only be at 90% max. Some manufactures make a 2400W dimmer, if that makes you feel better and the architect appoves of the looks. They are big and ugly. Pay attentiion to the manufactures derating for ganging, if applicable. The dimmer will feel like a small room heater when full bright so, as stated earlier, give the dimmer room to breathe around the front plate- ask about plans for fabric finish on the wall that will trap heat. Make sure that you are not sharing a neutral for the supply circuit. The dimmer will likely have a short life compared to others more suitably loaded at 80%.
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