freezer
- Thread starter jy
- Start date
- Status
mdshunk
Senior Member
- Location
- Right here.
Re: freezer
I can't recall any minimum temperature limits in the NEC.
The internal wiring of a freezer, unless it's a walk in type, would't really be covered by the NEC anyhow.
I can't recall any minimum temperature limits in the NEC.
The internal wiring of a freezer, unless it's a walk in type, would't really be covered by the NEC anyhow.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: freezer
A product standard from UL, perhaps appilances or freezers. You can download the UL General Product Listing Directory - White Book from this web site and propably find it there.
The NEC would cover the wiring to the freezer.
A product standard from UL, perhaps appilances or freezers. You can download the UL General Product Listing Directory - White Book from this web site and propably find it there.
The NEC would cover the wiring to the freezer.
- Location
- Massachusetts
Re: freezer
The NEC certainly can and does apply to the wiring in coolers, freezers etc.
We are not talking about a simple appliance here, we are talking about something built on site, the NEC applies.
We have built cold storage warehouses bigger than 500,000 sq feet, the entire space was kept at -20 F.
The NEC certainly can and does apply to the wiring in coolers, freezers etc.
We are not talking about a simple appliance here, we are talking about something built on site, the NEC applies.
We have built cold storage warehouses bigger than 500,000 sq feet, the entire space was kept at -20 F.
- Location
- Massachusetts
Re: freezer
It is common to use rain tight methods in freezers and coolers but that is not required.
One NEC rule that I urge you strongly to comply with is 300.7
Every raceway that passes from the inside to the outside of the cooler needs to be sealed.
Duct seal can work, we often use silicone and some use spray foam.
You can check with the wire manufacturer's for recommended wire types.
We use THHN, remember you will not be installing it at -40F. Once it's in place and not being flexed the cold will not effect it.
Wire it like you would any space.
It is common to use rain tight methods in freezers and coolers but that is not required.
One NEC rule that I urge you strongly to comply with is 300.7
If you ignore this you will have problems, condensate will collect in the boxes, raceways etc.
Every raceway that passes from the inside to the outside of the cooler needs to be sealed.
Duct seal can work, we often use silicone and some use spray foam.
You can check with the wire manufacturer's for recommended wire types.
We use THHN, remember you will not be installing it at -40F. Once it's in place and not being flexed the cold will not effect it.
- Location
- Logan, Utah
Re: freezer
I agree with iwire,
I have had to go on a few service calls on walk in freezers where the conduit running into the freezer was not sealed, needless to say the switch directly below the conduit filled with condensate, froze, and shorted out.
Chris
I agree with iwire,
I have had to go on a few service calls on walk in freezers where the conduit running into the freezer was not sealed, needless to say the switch directly below the conduit filled with condensate, froze, and shorted out.
Chris
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