[stringpickin]

Hey and good day..

I have a 3hp 220 tablesaw running on a separate 30amp breaker.

Can I in effect put a splitter on that outlet and run a 16,000 btu window air conditioning unit on that same line.

I know we do it all the time on 110, plug in a circuit strip and plug up to six units into it and it works great..

Can I do this with the 220 plug??

If yes, If I use a 25' 12 gauge extension chord for the AC unit be okay on the end of that?

Is it possible the "while running" load will not be too much to use a splitter, but if both units happen to start at the same time will it draw too much and through the breaker?

thank you very much for your time..

 

[Just Bill]

Yes, you can chain 200 outlets just like you do 120, but I am not sure you can run the saw and the A/C at the same time. Sorry, extension cords not recommended, especially not a 25' cord.

 

[Speedy Petey]

Also, you say this is a 30A circuit. You CANNOT have 20A receptacles on a 30A circuit.
A 16kBTU window A/C will NOT require a 30A receptacle. More like 15A.

 

[Yoyizit]

I have a 3hp 220 tablesaw

a 16,000 btu window air conditioning unit on that same line.

3hp @ 220v = ~10A
A/C @ 220v = ~7A

Depending on the trip curve of the breaker you might never have a problem but the NEC may have some things to say about this.

 

[Speedy Petey]

3hp @ 220v = ~10A

HUH???

Try 17A.
NEC Table 430.248

This is of course if it is a REAL 3HP and not a BS "developed" HP number that Sears might try to sell.

 

[Yoyizit]

HUH???

Try 17A.
NEC Table 430.248

This is of course if it is a REAL 3HP and not a BS "developed" HP number that Sears might try to sell.

I did 3 hp x 746w/hp divided by 220v. How'd they do it?

 

[Bigplanz]

I think a dryer or baseboard heater has to be on a separate 240V circuit. I guess you can string them for general purpose outlets though. Can't find anywhere that says you can't.

 

[Speedy Petey]

I think a dryer or baseboard heater has to be on a separate 240V circuit. I guess you can string them for general purpose outlets though. Can't find anywhere that says you can't.

???
"You think..."
"You guess..."
"Can't find anywhere that says you can't."

How 'bout the NEC?

 

[unclduey]

Did anybody notice if he said what voltage his AC unit was? Does his 220v 30 A circuit have a neutral?

 

[unclduey]

Did anybody notice if he said what voltage his AC unit was? Does his 220v 30 A circuit have a neutral?

my mistake, didnt see the voltage in the header

 

[Bigplanz]

???
"You think..."
"You guess..."
"Can't find anywhere that says you can't."

How 'bout the NEC?

I was busy chasing the kids as they were running all over the backyard. Didn't feel like looking it up. Google is your friend though. I was just going off what I remembered off the top of my head. Is there going to be a test later?

Edit to add: "Can't find anywhere that says you can't." I should have said I can't 'remember' rather than find. Sorry about your confusion.

 

[J. V.]

I was busy chasing the kids as they were running all over the backyard. Didn't feel like looking it up. Google is your friend though. I was just going off what I remembered off the top of my head. Is there going to be a test later?

Edit to add: "Can't find anywhere that says you can't." I should have said I can't 'remember' rather than find. Sorry about your confusion.

Google is not any help in any NEC discussions. You either have the NEC code or you don't.
Do not take offense. Speedy is knowledgeable and his answers are reliable. We have to be very careful in this format. This is a DIY forum and we do not want bad information to be taken literally. I have made this mistake before, and was corrected immediately. If you do not know the answer for sure, do not give advice on the question. As you see, it will get corrected in a hurrry and not all here are as easy as Speedy was on you. John :thumbsup:

 

[Speedy Petey]

I'll admit, my internet persona is not one of being warm and fuzzy, and I tell it like it is, and I can be quite sarcastic, but I do try to post facts and correct information. If I post an opinion I will make that very clear also.

Edit to add: "Can't find anywhere that says you can't." I should have said I can't 'remember' rather than find. Sorry about your confusion.

You post incorrect information; and post "You think" and "You guess"; and you say you can't remember; and I am the one that's confused?
Nice try. :laughing:

 

[nap]

Ya, petey is just a big softy.


as petey suspects, and I, the recep needed for the AC will be of lesser ampacity rating than the saw circuit is fused for. As such, you cannot install such a lesser rated receptacle on that circuit without proper fusing.

 

[Bigplanz]

If you can't find the NEC in a PDF format on-line you aren't looking very hard. You can even download the 2005 or 2008 legally, since if a code is adopted by a jurisdiction it becomes part of the public record and has to be made available to the public. If you want I could post a link. Just let me know.

I did a key word search on "dedicated circuit" and the only one I found was for a hot tub/ hydrospa.

I suppose my memory is from an internal document we have at the office concerning wiring requirement for single family permits. We give it to homeowners when they pull a homeowners permit.

 

[Bigplanz]

You post incorrect information; and post "You think" and "You guess"; and you say you can't remember; and I am the one that's confused?
Nice try. :laughing:

Which part was incorrect? Please quote the NEC if you wish to be taken seriously.

 

[nap]

=Bigplanz;265353]If you can't find the NEC in a PDF format on-line you aren't looking very hard. You can even download the 2005 or 2008 legally, since if a code is adopted by a jurisdiction it becomes part of the public record and has to be made available to the public. If you want I could post a link. Just let me know.

that is only if the code is accepted into the law by reproduction. The NFPA specifically does not allow this. They will only allow acceptance by reference which allows the NFPA to control the copywritten product and as such, can dissallow any reproduction.

 

[Speedy Petey]

Which part was incorrect? Please quote the NEC if you wish to be taken seriously.

Like I would even give a crap if you took me seriously.


For your education:

I think a dryer or baseboard heater has to be on a separate 240V circuit.

A 120v fixed in place heater can be shared with receptacles if it is 50% or less of the circuit.
NEC 210.23(A)(2)

Just being a baseboard heater does not require a "separate 240v circuit". You can have as much heat as you want up to 80% of the circuit. NEC 424.3(B)
Or you can share a 240v circuit provided you calculate the load properly.
If you share it with 240v receptacles then NEC 210.23(A)(2) again applies.
For a 30A circuit 210.23(B) applies and can only be shared with 30A receptacles. 30A receptacles are typically not considered "general purpose".
See also T210.24

I guess you can string them for general purpose outlets though.

Again, not the dryer circuit as it is 30A: Table 210.21(B)(2) & Table 210.21(B)(3) and T210.24

A 120v fixed in place heater can be shared with receptacles if it is 50% or less of the circuit.
NEC 210.23(A)(2)

Just being a baseboard heater does not require a "separate 240v circuit". You can have as much heat as you want up to 80% of the circuit. NEC 424.3(B)
Or you can share a 240v circuit provided you calculate the load properly.
If you share it with 240v receptacles then NEC 210.23(A)(2) again applies.
For a 30A circuit 210.23(B) applies and can only be shared with 30A receptacles. See also T210.24


Now please put me on ignore so you don't have to deal with me. You'll be better off. :whistling2:

 

[Speedy Petey]

Now that we have gotten way off topic, let's get back to the OP.

You can only do this if the A/C uses a 30A plug, which we are saying it should not.

What is the circuit wiring and receptacle for the 30A saw circuit? #10 and 30A I hope.

 

[Bigplanz]

that is only if the code is accepted into the law by reproduction. The NFPA specifically does not allow this. They will only allow acceptance by reference which allows the NFPA to control the copywritten product and as such, can dissallow any reproduction.

All the PDF versions on line are state laws with a xeroxed copy of the NEC as an attachment. You are downloading the 'law' and a xeroxed (the PDF) copy of the NEC. It's still searchable, which is very helpful.