220 to a Table Saw

[Error]

I have a 100A sub panel in my workshop and have space in it. I want to run some 220 circuits to power tools. I am wondering what wire I run from the panel to the receptacles. When I ran a 220V circuit for my welder, it was 30A and I used 8-3 wire and a dryer plug.

I'm told that I need a receptacle that has one of it's poles horizontal and one vertical. I bought one of these things to look at and realize that I can't run 8-3 to this type of receptacle. What wire do I use?

Thanks!

[joed]

15 amp circuit use 14/2.
20 amp circuit use 12/2 cable.
Size of circuit depends on tools you are going to be using.

[Homer]

Motors wired for 240V only need 2-conductor plus ground (black, white, bare) cable. The white conductor needs to be remarked with black tape at both ends. Each conductor is connected to the terminals of the 2-pole breaker and the ground to the ground bus.

As Joed pointed out, you need to determine what the load requirement of the tool is. The instructions should tell you the size of the circuit required. If not, post back with the HP rating of the motor and we will help you with it.

For a 15A circuit you need a 15A, 2-pole breaker, 14/2 cable, and a 6-15R receptacle.
http://www.leviton.com/images/techsupp/615r.jpg6-15R

For a 20A circuit you need a 20A, 2-pole breaker, 12/2 cable, and a 6-20R receptacle.
http://www.leviton.com/images/techsupp/620r.jpg6-20R

For a 30A circuit you need a 30A, 2-pole breaker, 10/2 cable, and a 6-30R receptacle.
http://www.leviton.com/images/techsupp/630r.jpg6-30R

Homer

[Error]

Hi Guys!

Thanks for the replies. The saw motor HP is stamped at 2HP.

Thanks!

[Homer]

A 2HP single phase motor at 230V has a full load current of 12A. It needs a circuit with an ampacity of at least 15A.

So, the saw should have a cord cap (plug) that is 6-15P since this is an appliance suitable for a 15A circuit.
http://www.leviton.com/images/techsupp/615p.jpg6-15P

For the 240V receptacle you have two choices just like with a 120V receptacle. You can use a 6-15r receptacle with 14/2 cable and a 15A 2-pole breaker OR you can use a 6-20r receptacle with 12/2 cable and a 20A 2-pole breaker.

Remember that a 6-15P plug will fit into either a 6-15R receptacle or a 6-20R "T-slot" receptacle, or a CSA 6-20RA "T-slot" receptacle (Canada only).

The concept is the same as plugging in a 120V appliance with a 15A plug into a 20A receptacle on a 20A circuit.

I would consider installing a 20A circuit which will allow you to use the receptacle for tools with both 15A and 20A plugs.

A point to be aware of is that in Canada the CSA 6-20RA receptacle is the "T-slot" the same as the Nema 6-20R in the US. In Canada the CSA 6-20R is not a "T-slot" and can only accept 20A plugs. So, if you go with the 20A receptacle in Canada make sure that it's the CSA 6-20RA.

Homer

[Error]

Thank you very much. Your information has been complete and accurate. I appreciate the time you took to answer my question.

Cheers!

[Error]

I wired a dedicated 20A circuit with 12-2 wire and a 6-20R receptacle. Upon inspection of the new saw, it has a plug for a 6-15R receptacle. Is there any caution in just using a 6-15R receptacle on this 20A outlet?

Thanks

[joed]

You can't by code use a 15 amp receptacle on a 20 amp circuit in Canada. A 6-20R has a T slot and should accept the 6-15 plug.

[Error]

Thanks. I ran a T-slot. The problem I have now, is the tool doesn't turn on. I'm tired and at a loss here. I have 12-2 wire running to the outlet. I have a 20A 2 pole breaker with black and white wires running to the breaker and the ground to the ground bus. I have 120V from each hot to ground, but was told that I need to have 240 between each hot. I have zero between each hot and the tool doesn't turn on. I'm just totally confused now.

[Homer]

...I have a 20A 2 pole breaker with black and white wires running to the breaker and the ground to the ground bus. I have 120V from each hot to ground, but was told that I need to have 240 between each hot. I have zero between each hot and the tool doesn't turn on...What this tells me is that you did not install a 2-pole breaker. You have installed a tandem breaker instead.

A 2-pole breaker will occupy 2 spaces in the panel. A tandem breaker only takes 1 space and has two handles.

A 2-pole breaker makes contact with both HOT busses in the panel (240V between them) while a tandem breaker only makes contact with one.

BTW, If this is by any chance the first circuit in a new subpanel, are you sure that you have connected the 240V feeder properly?

Homer