question on switches

[cyber-bill]

I was looking at 110 volt 20 amp switches the other day, the simple one light single pole type. On the switch was ingraved use on 110 volt only. My question is why can't you use this switch inside the cabin for 12 volts? Also if you can use this type of switch for 12 volts would it be o.k. for 16 amps 12 volts?
Bill

 

[tashasdaddy]

Re: question on switches

i would use a marine switch.

 

[Silvertip]

Re: question on switches

It will probably work for awhile but you must consider AC power vs DC power. There is a "power factor" at work there and switch arcing as the contacts open and close may affect its performance. I don't think there is a danger of fire but as I said, it may pose a longevity issue.

 

[Barnacle_Bill]

Re: question on switches

You will probably be replacing it within a year due to corrosion. Use a marine switch.

 

[Texasmark]

Re: question on switches

When breaking a circuit, especially inductive, you have an arc. With ac current, since current reverses 50-60 times per second, with low inductance loads, it is easy to extinguish the arc. With inductive loads it lasts longer due to the nature of motors, inductors, lamps, but it still has help.

In dc the current is direct and you have to stop it with the switch contacts. Therefore, as stated, reliability is an issue as the contacts are not made for that type of circuit breaking.

Additionally, a sealed marine switch keeps the environment out and if your ac switch is what I think it is, it's made for the inside of your home.

Mark