Question about RTO Intermatic T101P201 Timer Switch Two Circuit Time Switch 110V

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What does the term two circuit mean? Is it the same as double pole? Just another way to say it?

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Yes a two circuit is the same as a double pole....the two circuit are commonly used to run two piece say for a pool like a heater and a pump or two pumps....a double pole could be used IF they are both run from the same line, but NOT if they are run from two separate lines...


Posted on Aug 21, 2010


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Do I need a main breaker in front of a manual transfer switch

I'll assume you are isolating the main breaker that carries in current from the pole (this is called a service disconnecting means). By the term "main breaker" I'm assuming you are referring to a feeder disconnect; that is to protect the generator from over-current.
Under these assumptions, no, the generator has a circuit breaker capable of interrupting the circuit leading to the transfer switch. Under these conditions, you could view the genset's breaker as a "main".

Sep 23, 2014 | Electrical Supplies

2 Answers

I have 110 volts n each leg but not 220 across both why??

In a traditional North American residential electrical panel (120/240 volt, single phase), installing a single width or single pole circuit breaker, you would expect to read 120 volts from the breaker terminal screw to either ground or neutral. A double width or double pole breaker would provide 120 volts from either of the breaker terminal screws to ground or neutral AND it will provide 240 volts BETWEEN the TWO breaker terminals.

A single-width circuit breaker case that contains two handles is NOT a two pole circuit breaker (these are called "tandem" or "1/2 size" breakers). This is because a single width breaker engages only one "line" in the panel. A double width breaker will engage 2 "lines" as a triple width breaker would engage 3 "lines" of a 3 phase panel. A single wide breaker can not physically engage more than 1 "line" so it will never be able to pass 240 volts.

You must install a double width / double pole breaker to safely supply a 240 volt circuit / device.

Mar 15, 2014 | GE 20 Amp 1 In Double Pole Circuit Breaker...

1 Answer

Can 40mp dryer and 40 mp range be computable

Hi - I'm an electrician an would like to help you with your question.

But - Umm.. huh?

By "40mp" Do you mean 40 amp? They are both "computable" but I suspect that you meant compatible. If so, yes, 40 amps is 40 amps regardless of what it supplys, as long as the wire is the right type and size. I haven't seen a 40 amp residential dryer though. Residential electric ranges and electric dryers are both 240 volts - but the dryer is usually a 30 amp circuit (#10 copper) and protected by a double pole 30 amp circuit breaker. The range is a 40 amp circuit (#6 aluminum) and protected by a double pole 40 amp circuit breaker.

If this doesn't answer your question, please explain in greater detail.

Feb 07, 2013 | Connecticut Electric Electrical Supplies

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Wire down from a double pole to a single pole switch which color Black or white goes on the top screw?

You question does not make sense to electrician.
So add a comment with more detail.

Here's what I can say so far:
1) Single-pole switches have 2 brass screws plus green ground screw. Line and Load wires connect to either screw.

2) Double-pole switches have 2 brass, 2 dark, and green ground screw. Do continuity test with multimeter to check relationship between screws.

3) Some people say double-pole when they mean 3-way switch, that has 2 brass, 1 dark, and green ground screw. Dark screw is 'common' for both Line and Load wires.
Screws are color-coded and tell electrician how to wire device.

Electricians don't guess, they test. So if there is confusion, electrician will test wiring before connecting switch.
That's as far as I can go without more information.

Please add a comment and give full information what you are doing, and what color screws you are working with, and how many different cables enter the box, and what relationship is between single-pole and double-pole switch.

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
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Feb 21, 2011 | Leviton 15a 120v Sp Switch

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Can a 240 volt outlet be ran off this breaker and can a 240 volt electric baseboard heater be wired to it or should i use double pole breaker?

You need 240 breaker:
Notice that your 240V breaker is twice as wide as regular 120V breaker.
Notice that both switches are tied together on 240V breaker, making this a double-pole breaker.
For more information about breakers and 120-240V circuits:

Jan 24, 2011 | Siemens 20 Amp Single Pole Breaker 120/240...

1 Answer

How do i wire my diehl 880 ?

1) Here is Diehl 880 instruction manual

2) Diehl 880 is 120V timer
-1/2 HP
-1000 Watt tungsten. Tungsten means incandescent light bulbs.

3) Checklist:
a) Your load does not exceed capacity > Timer is too lightweight to control 1500 toaster oven.
b) You need 120V line coming from breaker box with black Hot wire and white Neutral
c) You need 120V line going to Load that also has black and white wire
d) Test each black wire to ground to see which black wire is HOT

4) Deihl 880 sell sheet pdf says 880 is available SPST (single pole single throw) -or- SPDT (single pole double throw).
-The difference is pole #4 on the timer.
-If you are trying to turn one circuit off just as another circuit turns on, then you need the SPDT
-If you are turning one circuit on-and off, then the following instructions are for you


5) Wire clock
-There are 5 poles > look for markings 1-thru-5
-If no marking, then poles 1&2 are probably spaced apart from other poles
-Connect Hot and Neutral wires to poles 1&2 >> this powers clock motor, they go on either pole

-Pole 4 not used

6) Wire timer
-Poles 3&5 are timer circuits
-Connect Hot line to pole 3
-Connect black wire going to Load to pole 5
-Connect white wire from Load to Neutral

Oct 01, 2010 | Diehl TIME CLOCK- 120V 24 HOUR

1 Answer

Pushomatic Double Pole, 20amp problem. When I

Most two-pole breakers have a small plastic bar that connects the two switches allowing them to be synchronized and used as a single breaker. However there are some two pole breakers that are intended to be used as two separate breaker and lack the need for the bar that synchronizes them, this is because they are not being used to power a single circuit or item, but separate circuits, or items. so no the breaker is not bad, and yes can be used to power single circuits or items.

Jan 17, 2010 | Connecticut Electric & Switch Thqp115...

2 Answers

Hobart H600 Double Pole Breaker

You need to get a new electrician; a real electrician would read the power requirements on the motor name plate and install the correct voltage and amperage circuit.

A single pole breaker does not supply the same voltage as a double pole breaker. It hums because the voltage is wrong

May 31, 2009 | Hobart H600 Stand Mixer

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