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The size of wire and breaker sizing are based on the current of the circuit. To answer this question a voltage must be stated or look on the ballast for the amperage and add that to the question.

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Q: What size wire and breaker you need for metal halide 400w bulb?
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Related questions

Is 400w hps better than 400w halide bulb?

yes


How do you ignite a 400w electronic metal halide or high pressure sodium bulb?

You need the appropriate ballast for either of these bulbs to make them light.


Can A 70 watt metal halide bulb be replaced with A 150 watt halide bulb?

No. A 70 Watt metal halide bulb can not be replaced with a 150 Watt halide bulb.


Can you use a 400W high pressure sodium bulb in a metal halide ballast?

No, the ballast has to be matched to the lamp. 250 watt ballast, 250 watt lamp. Also be sure to match the lamp type to the proper ballast even though the wattage is the same. HPS ballast to HPS lamp, Metal halide ballast to metal halide lamp and mercury vapour lamp to mercury vapour ballast.


Does a fluorescent bulb emit the same amount of heat as a metal halide bulb of the same wattage?

No, a fluorescent bulb does not emit the same amount of heat as a metal halide bulb of the same wattage.


Can a 400 watt high pressure sodium bulb be used in a 400 watt metal halide ballast?

I actually have a 400w hps ballast and I can also use my 400w metal halide bulb in it with no problem. So what your saying is they do, but they dont? the answer is, they dont. You can get universal bulbs hps to plug into a mh ballast they have a miniturized igniter inside the bulb. As I understand it, a 400W metal halide bulb can be used with a 400W hps ballast, but not the converse. A MH bulb has the igniter in the bulb, and the HPS has it in the ballast--which pretty much goes along with your comment above. Apparently the double presence of the igniter in the HPS setup is OK.you can run metal halide in same wattage's but not hps in metal halide systems.you can run such as (same wattage's)250 watt metal halide-400 watt halide ect in hps systems but not hps bulbs in halide systems. they make conversion bulbs to run halide in hps as well and vice versa.


Why Metal halide fixture with a 175 w bulb and correct ballast could overheat?

Make sure you are using a metal halide bulb and the ballast is matched to the wattage on the bulb. These both must be correct.


Can you use 250W metal halide bulb in a 1000W metal halide ballast?

No. The lamp has to match the ballast. The lamp will not ignite if the wrong ballast is used.


Can you plug a ballast into a 120V outlet that is normally meant for 240V outlets if it's a 400W metal halide light bought in Korea and will it run in the US?

No, but it's usually quite easy to run a 220V line to wherever you want to put the bulb.


How does a metal halide ballast work?

A metal halide ballast works just by transforming the line voltage into much more useful voltage to the metal halide, and by regulating the current so that the bulb will have its useful life at the most.


How many plants can you grow with 175 metal halide bulb?

one or two max


What is the voltage at a 100 watt metal halide light bulb?

It depends......perhaps 7400 to 8500 initial lumens degrading to 5400 lumens.