ECN Forum Forums General Topics of the Trade General Discussion Area Expecting 120 volts and finding 240 volts

Hi Chris,
this would be a 'multiwire branch circuit'.In a dwelling, the only change would be 210-4(b), which would require a double pole circuit breaker. the rationale, i imagine, is for the protection of the homeowner DIYer,as the normal 120v receptacle would be taken at face value.