Lighting circuit length limit?


Old 09-24-18, 05:22 PM
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Lighting circuit length limit?

Is there a recommended way to install lights in an apartment? I was thinking of one circuit for all rooms but wondering if there was a limit to the wire length in 14/2 due to voltage drop. Maybe some sort of radial pattern is better?
there would be a total of 12 outlets in the ceiling.
Question: if I install LED recessed lighting, is the limit still 12 per circuit or can you increase in this case?
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Old 09-24-18, 06:07 PM
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Not sure what the maximum length of a branch circuit can be from panel breaker to the furthest outlet but the length is at least 100 feet for 14 gauge (15 amps) or 12 gauge (20 amps) before you run into excessive voltage drop problems.

If the circuit branches off in the middle (has subbranches instead of being one continuous daisy chain) each possible path can be 100 feet or whatever the magic number is for voltage drop purposes.

Many recessed light fixtures have a connection box that is too small to branch off from. Those fixtures must be connected all in one straight or zig zag or curved line.

Since the code book (here, the CEC) already states a maximum of 12 outlets in a branch circuit, you will need to find an exception in order to have more, say for LED fixtures. Maybe there is a change or exception that was approved very recently and published in a later version of the CEC.

Last edited by AllanJ; 09-24-18 at 06:25 PM.

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