CS Pars - current draw?

So, because I'm dumb. I'm looking at the CS Par specs and I'm wondering why the limit is 9 units per 20 amp circuit?

At 120watts maximum draw per fixture on 120vac, that's only 9amps.

I can understand only pulling 15amps through the 15amp rated PowerCON connector, but we're not even at that point. Is there an inrush or something I'm missing?

I think I might have to pull 10 units from a single circuit and want to see if that's feasible.... but mostly, I want the numbers to add up & make sense.

Thanks!

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0 sk8rs_dad over 4 years ago
There are a couple of contributing factors:

the maximum current for the original powercon connector is 16 amps, not 20.

The limiting factor is inrush current when the units are initially powered on is very high. The capacitors in all those power supplies look like a dead short initially. Steve Terry wrote several articles about it, not that I can find them when needed.

FWIW, the numbers add up and make sense, but over-simplifying the problem to ohms law using steady-state current does not.
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0 Wuz314159 over 4 years ago in reply to sk8rs_dad

Thanks!

I never really understood inrush calculations anyway.. but it's something I can easily accept.
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0 Wuz314159 over 4 years ago in reply to sk8rs_dad

Thanks!

I never really understood inrush calculations anyway.. but it's something I can easily accept.
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