3 wire 240v to 2 wire intermatic t104 timer

[apartmentblower]

hiya

ive got an Intermatic T104 240v timer being hard wired to a 240v 30amp circuit. the intermatic timer has good instructions on how to hook it up to a 2 wire (2 hot + 1 ground) 240v circuit but im running 3 wire (2 hot + 1 ground + 1 neutral). where does neutral from breaker go in the timer box?

also, does it matter which hot goes to which hot? ie. are black and red interchangeable?

thanks

 

[RedReign]

The T104 has a 240v clock motor (actually 208-277, but that doesn't matter in this case), so it doesn't need a neutral. You can use the 'A' terminal for your neutral wires, since it isn't connected to anything, or you can just wire nut the neutrals together.

The black and red both carry 120v, so yes, they are interchangeable.

 

[apartmentblower]

to cap off, do i just attach neutral to neutral bus on main panel, and then cap it off on the other end?



thanks

 

[cocktail frank]

there is no neutral with 240v.
you can just cap it off.

 

[RedReign]

Does the equipment (lights or whatever) that the timer is controlling need 120 volts?

If not, you can cap both ends of the neutral wire, or tie one end to the neutral bus and the other to the 'A' terminal on the timer, or the way you mentioned. It really doesn't matter if it isn't going to be used.

 

[apartmentblower]

;

 

[apartmentblower]

Does the equipment (lights or whatever) that the timer is controlling need 120 volts?

If not, you can cap both ends of the neutral wire, or tie one end to the neutral bus and the other to the 'A' terminal on the timer, or the way you mentioned. It really doesn't matter if it isn't going to be used.

main panel ----> 30amp dual pole 240v breaker ---> hardwired to timer ---> timer is wired to 4x 240v outlets and 4x 120v outlets


please advise

the timer board was wired up to the outlets at the shop, and all im supposed to do is hardwire it in... so now that you know that i am running 120v and 240v off the timer what to do with the white wire?

 

[apartmentblower]

ok the reason im still waiting for an answer from someone is because im not sure if i have to do anything special with the neutral wire becuase im running 4x 240v outlets and 4x 120v outlets. the timer box itself and the outlets are all already wired up previously. what i need to do is hardwire it to the 30amp 240v circuit. thanks to the repliers we have established what to be done with white neutral if im just running 240v outlets (cap it off or connect "A" terminal). but in my situation where im running 4x 240v outlet and 4x 120v outlet where does the white neutral go?

 

[apartmentblower]

top top top

 

[apartmentblower]

come on guys dont want to burn down house or kill myself


RR said: "Does the equipment (lights or whatever) that the timer is controlling need 120 volts?

If not, you can cap both ends of the neutral wire, or tie one end to the neutral bus and the other to the 'A' terminal on the timer, or the way you mentioned. It really doesn't matter if it isn't going to be used."


this makes me think that if i am in fact running some 120v fans off the same circuit i need to do something special with the neutral wire

 

[vancityj]

I have a T104 wired up 240V with the neutral...but, unfortunately it's in storage at the moment; I can have a look in the morning and get back to you tomorrow if you're still unsure.

 

[apartmentblower]

I have a T104 wired up 240V with the neutral...but, unfortunately it's in storage at the moment; I can have a look in the morning and get back to you tomorrow if you're still unsure.

where im confused and scared to go ahead is the fact that my timer is wired to BOTH 120v and 240v outlets (4 of each). What confuses me is that RR said that if I'm not running 120v, that the neutral can just be capped off, but I AM running 120v (for fans) as well as 240v (for lights) off the same timer/circuit. The way he worded the answer made me think that I have to do something special with the neutral in this case cause i'm running 120v as well as 240v. Is this true, and if so, what do I do with the neutral, or am I wrong and just assuming something thats untrue

if the timer was powering only 240v outlets, id cap off neutral. but something about the way he worded it makes me believe that since im running 240v and 120v outlets off the same circuit that the neutral is needed for something. i have no idea what and where it goes in this case

i understand that for 240v applications the neutral is not needed and can be capped off. but im running 240v and 120v off of the same timer. the guy at the shop wired it for me so i assume its possible.

im new at all this wiring and dont want to do something stupid


thx

 

[PharmaCan]

The neutral has to be connected to the neutrals from your 120v receptacles. If the entire board is pre-wired, you should have a neutral inside your timer box. Tie the neutral from your panel into that neutral wire/connection. If this isn't perfectly clear by just looking at your board, take some pictures and post them and someone will walk you through it. But you definitely want to have this hooked up properly before you power it up.

BTW, how far is your board from the panel and what size wire do you plan to run from the panel to the board?

PC

 

[apartmentblower]

The neutral has to be connected to the neutrals from your 120v receptacles. If the entire board is pre-wired, you should have a neutral inside your timer box. Tie the neutral from your panel into that neutral wire/connection. If this isn't perfectly clear by just looking at your board, take some pictures and post them and someone will walk you through it. But you definitely want to have this hooked up properly before you power it up.

BTW, how far is your board from the panel and what size wire do you plan to run from the panel to the board?

PC

ok, i will try to find the neutrals from the 120v receptacles. the timer is at a location without internet access so i cant post pics right away. ill try and figure it out. so you are confirming that the neutral has to go somewhere rather than be capped off for my application (running 120v and 240v). if all else fails ill just take it back to the grow shop and ask them but im trying not to frequent it too much...

im running 10/3 cable from panel to hardwired board, and its approximatley 1 foot of wire, maybe less after i trim it down. its right on the other side of the wall behind the main panel. ive already got it fed through the drywall just waiting to hook it up to the panel/breaker and timer

thanks for clearing it up so far, though

 

[PharmaCan]

ok, i will try to find the neutrals from the 120v receptacles. the timer is at a location without internet access so i cant post pics right away. ill try and figure it out. so you are confirming that the neutral has to go somewhere rather than be capped off for my application (running 120v and 240v). if all else fails ill just take it back to the grow shop and ask them but im trying not to frequent it too much...

im running 10/3 cable from panel to hardwired board, and its approximatley 1 foot of wire, maybe less after i trim it down. its right on the other side of the wall behind the main panel.

The neutral doesn't just have to go somewhere, it has to connect to the neutral for the board. If this board is professionally made, your neutral is probably connected to a terminal inside the timer. Anyway, yes, the neutral needs to be used, not capped off.

PC

 

[sparkjumper]

Isnt the T-104 a 208-277 volt 2 pole timer?How are you pulling 120V circuits out of the timer?

 

[RedReign]

Apartmentblower, since this is a premade timer board, were there wires on the 2 load terminals and the 'A' terminal when you bought it? There should have been. If not, take it back to where you bought it, something isn't right.

If there are wires on the 2 load terminals and the 'A' terminal, all you have to do is tie your 2 'hots' on to the line terminals and your neutral to the 'A' terminal.

 

[apartmentblower]

Apartmentblower, since this is a premade timer board, were there wires on the 2 load terminals and the 'A' terminal when you bought it? There should have been. If not, take it back to where you bought it, something isn't right.

If there are wires on the 2 load terminals and the 'A' terminal, all you have to do is tie your 2 'hots' on to the line terminals and your neutral to the 'A' terminal.

thanks, you got it perfect. the two seperate loads feed both 240v and 1-120v. the other 1 120v is connected to "line" so i think it has constant power while the other 120v outlet connected to load is timed. correct?


anyways the neutral from the main panel goes into the "A", that is where the 120v outlet neutrals go too.


thanks everyone

 

[apartmentblower]

Isnt the T-104 a 208-277 volt 2 pole timer?How are you pulling 120V circuits out of the timer?

there are 4 120v plugins, comprised of two seperate receptacles (sorry if my terminology is screwy) . both their neutrals go to "A" terminal (neutral from main panel connected to "A" ), and the hot from one goes to "load 2", and the hot from the other goes to "line 2". i think this means that the former is timed, the latter isn't.

and then there are 4 240v plugins, comprised of two seperate receptacles, (using standard 120v style plugins clearly labelled as 240v). these have their hots split between "load 1" and "load 2". so both are timed.

240v 30amp from main panel is split into "line 1" and "line 2"



sorry for no pics...

 

[apartmentblower]

Someone less experienced may not know that you could have two or more voltages in a device and need that neutral for that.

yes this is why i was confused. i couldnt get my head around how to properly wire 240v and 120v outlets both from a 240v circuit

its probably not up to code is it? but its safe right?