210.19 (A)(3)

[steve_p]

First, why can't I entire 210.19 in the search box and come up with any hits?

When I google it I can find posts on this site.

Anyway, I have a resort that has 35 which used to contain range / micro combination units. All fed with 6/3 romex, 50A breakers.

At some point these were replace with range and cabinet mounted micros.

At that time a contractor tapped off the 6/3 with 12/2 romex and installed 20A fused receptacles above the cabinet to power the microwave.

Was this compliant at one time?


Steve

 

[Smart $]

First, why can't I entire 210.19 in the search box and come up with any hits?

When I google it I can find posts on this site.

Anyway, I have a resort that has 35 which used to contain range / micro combination units. All fed with 6/3 romex, 50A breakers.

At some point these were replace with range and cabinet mounted micros.

At that time a contractor tapped off the 6/3 with 12/2 romex and installed 20A fused receptacles above the cabinet to power the microwave.

Was this compliant at one time?


Steve

Actually, I think it is still compliant under 2011 NEC.... 210.19(A)(3) Exception No. 1. The 20A fusing is to comply with receptacle and circuit rating requirements of 210.21(B)(3).

 

[steve_p]

Thanks,

Does a receptacle fit the description of a counter mounted-mounted cooking unit?

I thought this rule applied to hard wired 240v appliances. Can the tapped conductors be Romex?

Steve

 

[Smart $]

Does a receptacle fit the description of a counter mounted-mounted cooking unit?

I thought this rule applied to hard wired 240v appliances.

I believe the described micro' is a wall-mounted electric oven (Code terminology). The appliance type category is microwave oven.

As to the receptacle part of the question, I'll counter with: Do you hard-wire ranges?

Can the tapped conductors be Romex?

The Exception does not restrict wiring method (i.e. yes).

 

[don_resqcapt19]

Avoid the restrictions in that exception and just use 240.21(B)(2).

 

[Smart $]

Avoid the restrictions in that exception and just use 240.21(B)(2).

I don't think 210.19(A)(3) Exception 1 is all that restrictive. 240.21(B)(2) may add to it.

(2) Taps Not over 7.5 m (25 ft) Long. Where the length of
the tap conductors does not exceed 7.5 m (25 ft) and the tap
conductors comply with all the following:
(1) The ampacity of the tap conductors is not less than
one-third of the rating of the overcurrent device protecting
the feeder conductors.
(2) The tap conductors terminate in a single circuit breaker
or a single set of fuses that limit the load to the ampacity
of the tap conductors. This device shall be permitted
to supply any number of additional overcurrent devices
on its load side.
(3) The tap conductors are protected from physical damage
by being enclosed in an approved raceway or by other
approved means.

(B)(2)(2) isn't a problem in the OP's case. If the microwave were hard-wired, the fused receptacle wouldn't be required, but under 240.21 it would be.

Also, 210.19 doesn't impose a raceway requirement for any expose portion of tap conductors (assuming a non-metallic sheathed cable run is desired).

 

[steve_p]

Thanks Smart $ for your help.

The total length of this tap is approximately 6 feet.

Can those rules be used or would 240.21 (b) (1) apply?

 

[Smart $]

...

Can those rules be used or would 240.21 (b) (1) apply?

I'd go with the 210.19(A)(3) exception.

Note condition (3) of 240.21(B)(1). The load side of the tap conductors can only connect to a "switchboard, panelboard, disconnecting means, or control devices".

And condition (4) requires tap conductors to be in a raceway.

 

[kwired]

If you tap the existing 40 or 50 amp circuit and add a fused receptacle, wouldn't that fuse become the origination of a new branch circuit? Does this fuse need to be readily accessible? Does it need 110.26 working clearances? Not as many of those type of questions with supplemental overcurrent protection, but I don't see this as supplemental protection.

Then throw in the fact that this may be older wiring that was permitted to use the grounded conductor for equipment grounding. I don't think you can use this equipment grounding method with the new microwave outlet.

 

[steve_p]

Thanks

The microwave is plugged into one of these View attachment 8449 which is in the cabinet above the microwave and readily accessible.

The install is clean. The tap also comes off 6/3 romex so there are separate grounded and grounding conductors.

The issue is an EC doing a remodel on one of the units informed the manager that this setup was not code compliant. There are 35 units with this setup.

The resort manager is concerned with liability.

I have not seen this done before and want to advise the manager correctly.

If this is not safe and code compliant the resort will want to change them out to a dedicated circuit. Not an easy job with the panel locations.