in a house - a main panel is located in the garage, we have 5 breakers in panel feeding five panel throughout the house, in these panel we have 10 to 15, 20 amp breakers,(in 24 pole panels). art. 408.16 b (new for 2002) sayes that we need a main in the remote panels, am i reading this correctly thank you.
overcurrent protection
- Thread starter sleepy
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- Illinois
- Occupation
- retired electrician
Re: overcurrent protection
408.16(B) does not apply to the panels in the house, they are "lighting and appliance branch circuit panels", not power panels. 408.16(A) applies, but does not require a main breaker in the remote panels as long as the feeder OCPD has a rating equal to or less than the remote panel rating. I hope that the garage is an attached garage, because if its not this installation would be in violation of 225.30.
Don
408.16(B) does not apply to the panels in the house, they are "lighting and appliance branch circuit panels", not power panels. 408.16(A) applies, but does not require a main breaker in the remote panels as long as the feeder OCPD has a rating equal to or less than the remote panel rating. I hope that the garage is an attached garage, because if its not this installation would be in violation of 225.30.
Don
Re: overcurrent protection
408.16(B) POWER PANELS
"a power panelboard with supply conductors that includes a neutral and having more than 10% of its overcurrent devices protecting branch circuits rated 30amps or less shall be protected by a overcurrent protective devise..."
408.16(B) POWER PANELS
"a power panelboard with supply conductors that includes a neutral and having more than 10% of its overcurrent devices protecting branch circuits rated 30amps or less shall be protected by a overcurrent protective devise..."
- Location
- Illinois
- Occupation
- retired electrician
Re: overcurrent protection
As far as the overcurrent protection of the panels, neither type requires the use of a main breaker. The protection can be anywhere on the line side of the panel.
Don
408.16(B) does not define a power panelboard, it requires an additional level of overcurrent protection for a power panelboard where more than 10% of the breakers are rated 30 amps or less. Note that the 30 amp or less rated breakers referred to in this section will be 2 or 3 pole breakers, because if they were single pole breakers they would be serving "lighting and appliance branch circuits" and the panel would be a "lighting and appliance branch circuit panel", not a power panel.
As far as the overcurrent protection of the panels, neither type requires the use of a main breaker. The protection can be anywhere on the line side of the panel.
Don
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