NEC 702.6 requires a transfer switch for all standby systems. A customer wants a permanently installed generator to feed a panel that feeds loads that won?t be transferred or associated with the loads fed from the service. Basically he wants to install some heaters that can become energized with the generator if the power goes down in winter. The heaters will be fed exclusively from the generator panel and cannot run unless the generator is on. Is this allowed per 702.6?
NEC 702.6 Do I need a transfer switch
- Thread starter wyboy
- Start date
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- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Does the generator in question also supply other loads than these heaters? If not, if the generators supplies only loads that do not have another power source, then you don't need any transfer equipment. I get this from the third paragraph of 702.6.
dbuckley
Senior Member
- Location
- Canterbury, New Zealand
You know I'm not a code expert, but... if the genset has its own panel and loads with no connection to the rest of the installation then is it a "standby" system at all, and thus do any of the requirements for standby systems (legally required or otherwise) apply?
It surely must be a SDS though
It surely must be a SDS though
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Yes, it is, and requires all the usual grounding, including a jumper to the existing electrode system.It surely must be a SDS though
And don't call me Shirley.
handy10
Senior Member
- Location
- western suburbs, chicago
Seems to me dbuckley has it right. it is not a standby system. See second paragraph of 702.1, 08 NEC.
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