water heater disconnect

Status
Not open for further replies.
E

eem946

Member
1- in a comercial building can i use a regular switch to disconect the water heater or does it have to be a lockable disconnect
2- if the panel is within site can i just use the breaker as disconnect
3- would i still need a breaker lock out at panel breaker
4- how about in residential same questions
 
eem946 said:
1- in a comercial building can i use a regular switch to disconect the water heater or does it have to be a lockable disconnect
2- if the panel is within site can i just use the breaker as disconnect
3- would i still need a breaker lock out at panel breaker
4- how about in residential same questions
Click to expand...

1. If it is within direct line of sight and less than 50 ft there is no need to provide a locking method for the disconnection device. It does have to be rated to carry the current of the appliance so a "regular" switch may be a problem if your "regular" switch is a cheap one.

2- Yes

3- Not if you are referring to item number 2.

4. There is no distinction between residential and commercial. Both require a disconnection means for water heater appliances.
 
I used to use DP 30 amp switches for water heater disconnects in residences. I believe the disco must be rated 115%. Thus a 4500 wattt heater at 240V is 18.75 amps. 18.75 * 1.15= 21.56 amp disco.

I also agree with the above posts.
 
dieselram752 said:
The A/C non fused disconnect is the cheapest way to go.
60 amp rated and 8.00-10.00.
Click to expand...

I fully agree with this. A two pole 30 amp switch runs about $14 bucks, and requires a faceplate- , and a box. And, even though it sounds like the op wouldn't need it anyway, those non metallic A/C non fused disco's have locking provisions on the cover....
 
Status
Not open for further replies.
Top