240 volt lighting timer

[jmd445]

I have a 240 volt electronic lighting timer with two sets of single-pole / single-throw contacts operating simultaneously serving several 240 volt pole lights.

Each pole of the contacts is breaking one leg of the 240 volt supply to the light poles. Although I'd rather have a double-pole / single-throw switch I can't seem to find anything wrong with this design.

Your thoughts, this is a debate between me and a fellow electrician.

Thanks,

Jim

 

[Jim W in Tampa]

nothing wrong, it is a timer not disconnect

 

[iMuse97]

that's the standard contactor on a 240v A/C unit.

 

[ptonsparky]

Are the contacts isolated from each other? Depending on the load you may be able to use one set of contacts for line 1 and the other for line 2.

Other than that, it is just a controller.

 

[bobsherwood]

I see your point.. one coil might fail and you'd have only one hot to all lights... I would go with a double throw/double pole. a dime a dozen... But, there is nothing wrong with what you have.

 

[iwire]

If it happens this timer is controlling HID lighting the NEC requires the controller to break all ungrounded conductors. That requirement can be found in Article 410 ..... I think 410.54(B) but I am going from memory.

You might want to install a two pole contractor controlled by one pole of the clock.

 

[bobsherwood]

iwire.... I am really impressed by your code knowedge!! Makes me feel like I need to get my nose in it more often! Way to go dude!

 

[jmd445]

Iwire, I'm impressed. If both sets of contacts open together, does,'t this qualify?

Jim

 

[iwire]

Iwire, I'm impressed. If both sets of contacts open together, does,'t this qualify?

Jim

Jim honestly I am not sure it does not.

My thought is if the clock is listed for use as a double pole it does qualify however, if it is listed as two single poles that can be programmed for different times then it might not qualify.

I would likely go for a two pole contactor.

 

[ultramegabob]

I would likely go for a two pole contactor.

that is a simple fairly inexpensive solution...