210.19(A)(3) Exception 1

[synchro]

As an update to this odd ball situation, another option that surfaced is one of these Bussman covers that have a receptacle and a fuse.
They actually make a version that is a 4S cover.

A co-worker calls this a british style plug because 'all plugs in the UK are fused' not sure if that is accurate.
Using this supplemental protection can be provided. Granted that is only a 15A receptacle, and that is not a type-S fuse holder.
I'd probably put a 20A fuse in it for a I am guessing a ~1500W microwave.

Another alternative is a small Eaton 30A safety switch that uses a plug fuse, with part number DP111NGB. It's about 5" x 5" x 3.5". It accepts up to 8 AWG on its line side.

https://www.walmart.com/ip/Eaton-Corporation-30a-Safety-Switch-DP111NGB/154249325

https://assets.unilogcorp.com/2/ITE...0e8e4f15f9c4a9b7d764373e7c136d76943aadbc5.pdf

There's also a 2-pole version DP221NGB .

 

[jap]

Yes, but nothing exempts you from it. If you are going to use a receptacle in your tap, rather than hard wire the equipment, then you'll need to comply with the receptacle rules as well as 210.19(A)(3) exception.

Cheers, Wayne

I agree.

Also the cord on the microwave is more than likely not 12 guage even if a receptacle tap was allowed, which I don't feel that it is.

JAP>

 

[curt swartz]

That’s a good point, but i don’t see anything in the exception of 210.19(A)(3) that says you must comply with 210.21. As for the cord, I would say that it’s part of the listed assembly of the microwave. I think the wire leads are mentioned because some built-in microwaves can be hardwired.

That is exactly what the exception is about. Hard wired appliances. Not cord and plug "countertop appliances" that have an optional trim kit for the build in look.

 

[jap]

I think this particular tap rule needs to go away.

It always seemed like a cheesey way out anyway,, there,, I said it.

JAP>

 

[brantmacga]

That is exactly what the exception is about. Hard wired appliances. Not cord and plug "countertop appliances" that have an optional trim kit for the build in look.

What makes me question that is the exception specifically lists counter-mounted appliances.

 

[jap]

What makes me question that is the exception specifically lists counter-mounted appliances.

The difference is counter "mounted" and counter "top" appliances.

JAP>

 

[brantmacga]

The difference is counter "mounted" and counter "top" appliances.

JAP>

I guess idk what the difference is.


Sent from my iPhone using Tapatalk

 

[jap]

I guess idk what the difference is.


Sent from my iPhone using Tapatalk

Most counter top appliances come with a factory installed cord and plug.

JAP>

 

[wwhitney]

I guess idk what the difference is.

If you have a stand-alone cooktop that you cut into the countertop and secure it there, that's counter-mounted. It's certainly not counter-top.

Anyway, the allowances in 210.19(A)(3) Exception seem only to be useful for a hardwired piece of equipment, since no relief is provided for the rules limiting the use of receptacles.

Cheers, Wayne

 

[brantmacga]

I just looked in the hand book, and it shows hard-wired appliances in the example and says “Both factory-installed pigtails and field-installed conductors are considered to be tap conductors in applying this exception. “

So I am wrong. No recep without OCP.


Sent from my iPhone using Tapatalk

 

[tortuga]

Thanks for the discussion all,
this is where a simple service call to 'replace a outlet' can end up.

Yes, but nothing exempts you from it. If you are going to use a receptacle in your tap, rather than hard wire the equipment, then you'll need to comply with the receptacle rules as well as 210.19(A)(3) exception.

Cheers, Wayne

Good point 210.21(B)(3) has two exceptions where a receptacle can in essence be rated less than the branch circuit, welders and lighting.
The code would need to add a third exception. So the existing install was never compliant, or got changed later.

It appears 240.10 will allow the fused receptacle to not have to be readily accessible, so the fused switch (thank you Syncro) or fused receptacle can live happily behind the microwave.

 

[wwhitney]

It appears 240.10 will allow the fused receptacle to not have to be readily accessible, so the fused switch (thank you Syncro) or fused receptacle can live happily behind the microwave.

The question about the fused receptacle option is whether the fuse and fuse holder are listed for branch circuit protection, or only for supplemental protection. I looked into it once, and didn't get a definitive answer, but my impression was that it was only listed for supplemental protection.

Cheers, Wayne

 

[tortuga]

The question about the fused receptacle option is whether the fuse and fuse holder are listed for branch circuit protection, or only for supplemental protection. I looked into it once, and didn't get a definitive answer, but my impression was that it was only listed for supplemental protection.

Cheers, Wayne

Yeah good point .
I am under the impression its a UL listed 'outlet' product that can connect to a 50A branch circuit and provides a 120V 15 A single receptacle via ' supplemental protection'. There is no additional branch circuit created.
I would not be extending any branch circuit wiring from the fuse, I am told its ' the British way' to put a single 15 Amp receptacle on a larger branch circuit.

The fused switch @syncro posted would allow you to run branch circuit conductors, but then that switch would probably need to be readily accessible.