NEC 710 / Split Phase

beckkl

Solar Enthusiast
Joined
Jun 9, 2020
Messages
173
I was trying to determine if I can get away with a non-UL listed AIO unit for an off-grid property in Michigan, and was reading through the NEC, when I found this:

710.15(C) Single 120-Volt Supply. Stand-alone systems shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt service equipment or distribution panels where there are no 240-volt outlets and where there are no multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the service equipment. This equipment shall be marked with the following words or equivalent:

WARNING: SINGLE 120-VOLT SUPPLY. DO NOT CONNECT MULTIWIRE BRANCH CIRCUITS!


If I am understanding this correctly, I am not permitted to install a split-phase unit, or have any 240V appliances?
 

beckkl

Solar Enthusiast
Joined
Jun 9, 2020
Messages
173
I was trying to determine if I can get away with a non-UL listed AIO unit for an off-grid property in Michigan, and was reading through the NEC, when I found this:

710.15(C) Single 120-Volt Supply. Stand-alone systems shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt service equipment or distribution panels where there are no 240-volt outlets and where there are no multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the service equipment. This equipment shall be marked with the following words or equivalent:

WARNING: SINGLE 120-VOLT SUPPLY. DO NOT CONNECT MULTIWIRE BRANCH CIRCUITS!


If I am understanding this correctly, I am not permitted to install a split-phase unit, or have any 240V appliances?
Nevermind, I get it. BRANCH circuits. Duh.
 
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