GFI circuit for Table Saw

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Forum topic by rlamb007 posted 04-30-2012 03:12 PM 2100 views 0 times favorited 9 replies Add to Favorites Watch
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76 posts in 3452 days

04-30-2012 03:12 PM

Topic tags/keywords: gfi table saw unisaw

Hello all,
I am now the proud owner of a 96 model 5hp Delta Unisaw.
It does need some work, but should clean up nicely.

I need to run a dedicated 220 circuit for it, and was wondering if anyone uses GFI when putting these circuits in.
Of course, a GFI would be nice, but the breakers for these are really expensive.

I was wondering if most people use GFI on their table saws? Also does anyone have any pros & cons for GFI (beside $$$) for the circuit breaker?

Thanks everyone.

-Rob in KY

9 replies so far

View Bill White's profile

Bill White

5311 posts in 4874 days

#1 posted 04-30-2012 03:17 PM

GFCI is not often used/required for a TS. Most often used when the recept is in proximity of a water feature (sink, tub, pool, etc.)

-- [email protected]

View MedicKen's profile


1615 posts in 4376 days

#2 posted 04-30-2012 03:21 PM

You may be required to install a GFCI if the saw is in the garage. I would check local codes and with an electrician. Here in the Peoples Republik of Kalifornia ANY garage circuit under 7’ MUST be GFCI.

-- My job is to give my kids things to discuss with their [email protected]

View rlamb007's profile


76 posts in 3452 days

#3 posted 04-30-2012 03:37 PM

Thanks Guys…I am leaning towards not installing. The saw will be operated in a dry area, but it will be on unfinished concrete slab floor. Maybe I can install one later, but we all know how that goes.

-Rob in Ky

View Sawkerf's profile


1730 posts in 3982 days

#4 posted 04-30-2012 05:06 PM

GFI’s are used where proximity to water requires a more sensitive tripping mechanism. Table saws probably don’t need them.

-- Adversity doesn't build reveals it.

View ChrisK's profile


2048 posts in 3995 days

#5 posted 04-30-2012 05:22 PM

Most areas require GFCI in garages since the floor can get wet. For $80 why not?

-- Chris K

View NathanAllen's profile


376 posts in 4058 days

#6 posted 04-30-2012 07:32 PM

If in the garage or basement, better to be safe than sorry.

View Grandpa's profile


3263 posts in 3589 days

#7 posted 04-30-2012 08:21 PM

I believe the code says they are required in garages, unfinished basements, on kitchen counters, in bathrooms and withing 15 feet of a pool or spa (this includes whirlpool tubs). I used them in my steel shop with a concrete floor. I don’t think a bare concrete floor makes any difference. A basement is a basement. My bare shop floor looked like a garage to me so I used GFCI except on the 220V. It is not normally used on 220V unless it services a hot tub or something like that. Now with all that said local codes can require something different. Circuits that are for a dedicated appliance do not have to have GFCI. This is something like a refrigerator, freezer, washing machine or a sum pump in a basement. These trip so easily that motors can trip them and or a power outage will often trip one of them. Then you come home after a weekend away to find something green growing inside your refrigerator. Check locally first then proceed from there. I don’t think you will want one on a table saw because of the motor.

View rlamb007's profile


76 posts in 3452 days

#8 posted 04-30-2012 08:33 PM

Well I do plan on wiring the saw directly (No plug) and everything will be contain in sheathing or conduit.
Pricing the Breaker looks like it going to be about ~$120
A little more information – the existing wired 220 outlets done by my electrician when this outside garage building was made were not GFCI. All other wall outlets are protected.

View Grandpa's profile


3263 posts in 3589 days

#9 posted 04-30-2012 08:44 PM

What you have is standard I believe. I am not an electrician but I try to keep up with things that concern me as a home inspector. Not saying I do keep up but those things show up in new homes (old wiring methods). Sometimes electricians don’t keep up with new codes either. Man, now I will get taken to the whipping post.

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