How many commercial electric H3 cans on 15 amp circuit

anniel89May 14, 2014

Hi all,

What's the most you would put on one circuit? I plan to use LED bulbs but want to install for worst case scenario (incandescent).


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Once you tell us how many watts the bulbs are, the question can be answered.

    Bookmark   May 14, 2014 at 5:55AM
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Let's say 75 max.

    Bookmark   May 14, 2014 at 7:14AM
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Ron Natalie

A 15A circuit at 80% utilization is 1440 VA (for all intents and purposes here, watts). That's 19 75W bulbs. Actually, I think the biggest you can put in an H3 is 50W, so in that case you'd get 28.

    Bookmark   May 14, 2014 at 8:08AM
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Turns out it's a 150w max. The sticker has several options that I thought were all the different models - turns out it's the different kinds of trim and you can use different bulbs with certain trim.

The max bulb with some version of trim is 150w.
Therefore, I need to wire for that. Kinda stinks.

    Bookmark   May 21, 2014 at 9:22PM
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Why are you worried about the worst case scenario?

    Bookmark   May 22, 2014 at 1:38AM
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If you are worried about some unknown person in the unknown future switching out your LEDs for the max incandescents possible, the worst case scenario is that the breaker trips and they realize that they can't do that. It isn't going to burn the house down or anything.

    Bookmark   May 22, 2014 at 9:16AM
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Ron Natalie

It depends where he is in the country. In some places he may run into inspection issues, of course some places with strict energy codes wouldn't allow fixtures you could take the efficient bulbs out and replace them with the heat generators at all.

    Bookmark   May 22, 2014 at 10:24AM
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It's an inspection issue. I pulled a permit and I'm doing it right.

    Bookmark   May 22, 2014 at 2:14PM
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