Circuit for bench grinder questions

[WaterBoyz]

Adding a bench grinder to the far side of the garage. Using PVC grey pipe surface mounted. Total run is 64 feet from sub-panel to grinder. The grinder is labeled as 3/4 hp at 110V.

What size wire? #10 solid? Stranded?
What size breaker? 20 amp?

Thanks.........

I know there are charts but charts have variables and my old brain has trouble with too many inputs.

 

[James-W]

I would use 12 gauge wire and a 20 amp breaker.

 

[dogdog]

maybe you are thinking too much into this... You sure it's 3/4 HP and not 34HP or 3.4HP.

1HP=is about 745.7Watt... 3/4HP... I don't think it would cause too much problems on standard 12AWG 20AMP circuit... unless you have some thing special...

 

[WaterBoyz]

maybe you are thinking too much into this... You sure it's 3/4 HP and not 34HP or 3.4HP.

1HP=is about 745.7Watt... 3/4HP... I don't think it would cause too much problems on standard 12AWG 20AMP circuit... unless you have some thing special...

Yes, 3 quarter of a horsepower.

I was "overthinking" because of the length of the run.
Solid or stranded wire?

Thanks..........

 

[dogdog]

doesn't matter solid or strand at this low frequency of 60HZ, It's up to your situation , but won't have that skin effect of electrical transmission at this low frequency...

For example, I run solid wires when I run NM or those bx stuff... if I do conduits I would perfer strand, not necessary ... just easier. .... if you are doing it for industrial work, there is a differences I think... but home / small business... not too sure.

 

[sberry]

This is not a long run or huge load. It can be used on general circuits.

 

[alfredeneuman]

1HP=is about 745.7Watt...

That is based on 100% efficiency, and no machine on earth is 100% efficient.

 

[rlitman]

doesn't matter solid or strand at this low frequency of 60HZ, It's up to your situation , but won't have that skin effect of electrical transmission at this low frequency...

For example, I run solid wires when I run NM or those bx stuff... if I do conduits I would perfer strand, not necessary ... just easier. .... if you are doing it for industrial work, there is a differences I think... but home / small business... not too sure.

Agreed. However, in this case, it MAY be possible to push the wires through the conduit run (depending on how the conduit runs). Pushing the wire would require solid. Stranded can pull a little more easily. I'd say just use what you've got and don't overthink it here.

That is based on 100% efficiency, and no machine on earth is 100% efficient.

Sure, but there's still plenty of headroom on a 20A circuit.

 

[sberry]

I am about sure the grinder come with a common plug on the end says,,, simply plug me in to the wall.

I was "overthinking" because of the length of the run.

This tool about 1/2 loads a 15A circuit, maybe a little more and would run from a 100 ft 16 guage extension cord.

 

[Norcal]

If it says “110V” it’s most likely made by the ChiCom’s or in Taiwan so one can discount 1/3 of the claimed HP.

 

[Jim greengo]

I am about sure the grinder come with a common plug on the end says,,, simply plug me in to the wall.

This tool about 1/2 loads a 15A circuit, maybe a little more and would run from a 100 ft 16 guage extension cord.

 

[WaterBoyz]

OK
Thanks for all of the useful inputs.

Gonna run #10 stranded on the 20amp breaker. I upped the guage for future-proofing.

And, while I got your attention, I have another question.

Gotta run a power line (about 50 feet) for my air compressor. The motor plate says:
HP= 5 SPL
Volt= 230
Amp= 13.1

What size wire and breaker?

Again, thanks..........

 

[bczygan]

A standard 15A circuit with 14AWG wire will run that grinder fine.

That said, I use 20A breakers and #12 wire for all my general purpose outlets in the garage.


I would only use #10 for a dedicated circuit that needed it.

Bill

 

[teamextreme]

You won't be able to land #10 stranded on a cheapo outlet. You'll have to get a spec grade or equivalent that has backwired screw and clamp plates (or pigtail some #12 solid).

 

[thewatusi]

10 awg is a waste of money and extra effort.

 

[sberry]

Use the 10 for the compressor. There is no reason to "future proof" a general circuit. Ideally shops and garages should have 12/20 recept circuits.

 

[WaterBoyz]

Thanks for all of the honest and to the point replies.

I have changed the location of the grinder and adding 4 outlets to group my seldom used equipment together. These will be on the 12/20 circuit. The compressor will be on the 10/30 circuit.

I will be adding a remote control for the air compressor using a 6-hour wind-up timer.

Again, thanks to those that replied. Another reason why I enjoy being here.