There seams to be more and more enforcement to install a disconnect switch at the indoor portion of a ductless mini split. I have only seen one 3 pole switch made by Leviton that could potentially be used. Many inspectors are requiring and inspecting these switches but may not realize that they are "non" grounded switches. They need to mounted in a metal box in order to be grounded. Problem is they dont fit in a standard metal single gang box. You can chip away the plastic tabs on the switch and bend out the sides of the box to jam it in there, but is this really what people are doing, and they are passing? Please someone tell me there is another way or another product? I dont want to start mounting 4" square boxes on the surface of someone living room. What am I missing?
3 POLE DISCONNECT SWITCH FOR DUCTLESS MINI SPLIT
- Thread starter Aelectric
- Start date
- Status
mpoulton
Senior Member
- Location
- Phoenix, AZ, USA
Some, but not all, of those systems actually only require a 1 or 2 pole disconnect because the other conductors are low voltage signal lines, not power. For example, the Mitsubishi Mr. Slim systems have two hot lines and one control, and can be used with a 2-pole disconnect (at least according to the inspector on the project where we ran into this issue).
- Location
- Massachusetts
rt66electric
Senior Member
- Location
- Oklahoma
ZOMBIE fingers
ZOMBIE fingers
ZOMBIE fingers...............
ZOMBIE fingers
ZOMBIE fingers...............
chris kennedy
Senior Member
- Location
- Miami Fla.
- Occupation
- 60 yr old tool twisting electrician
No kidding. Fell off about a year ago but he saved it just such occasions.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
- Location
- Massachusetts
Yankees are known to be thrifty.
You assume it is my finger, it might be the finger of the last helper that wised off.
Sierrasparky
Senior Member
- Location
- USA
- Occupation
- Electrician ,contractor
I don't know if that will work with a normal box and plate. I don't think that device has threaded plate screw holes. If I recollect correctly you need to use one of those outdoor switch covers that you mount the switch to the cover.
Sierrasparky
Senior Member
- Location
- USA
- Occupation
- Electrician ,contractor
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Per their catalog, that's model AH7810UD, and the dimensions of the body (ignoring the toggle and the strap) are 1.69" wide, 2.31" tall, and 1.75" deep.
Cheers, Wayne
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
In contrast, Leviton shows the MS303-DS as 2.03" wide and 1.51" deep; they don't specify the height, but it looks comparable to the Cooper Arrow Hart.
So since the Cooper AH7810UD is narrower maybe it would fit better in a single gang box, as long as the box is deep enough?
Edit: maybe not, it looks like on the Cooper you have to bring the wires in from the side?
Cheers, Wayne
So since the Cooper AH7810UD is narrower maybe it would fit better in a single gang box, as long as the box is deep enough?
Edit: maybe not, it looks like on the Cooper you have to bring the wires in from the side?
Cheers, Wayne
I know it will fit in a 1G bell box because I've done it.
fbhwt
Electrical Systems Inspector
- Location
- Spotsylvania,Virginia
- Occupation
- Electrical Systems Inspector
- Status