Furnaces and water heaters
- Thread starter sjaniga
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bphgravity
Senior Member
- Location
- Florida
Re: Furnaces and water heaters
Yes, a switch that is rated for the full load current and/or the horespower rating of the equipment can be used as the means of disconnect. What is a ssu?
Yes, a switch that is rated for the full load current and/or the horespower rating of the equipment can be used as the means of disconnect. What is a ssu?
russ
Senior Member
- Location
- Burbank IL
Re: Furnaces and water heaters
Is that the 1900 box(4"square) cover with the fuse in it. We use to have to install those on furnaces, haven't used one in a long time. Theres diffrent letter combinations depending on whats in the cover, I think the switch fuse was a SSY
Russ
I was looking in 404.14 and 430.83 for the first answer.
[ March 30, 2003, 08:40 PM: Message edited by: russ ]
Is that the 1900 box(4"square) cover with the fuse in it. We use to have to install those on furnaces, haven't used one in a long time. Theres diffrent letter combinations depending on whats in the cover, I think the switch fuse was a SSY
Russ
I was looking in 404.14 and 430.83 for the first answer.
[ March 30, 2003, 08:40 PM: Message edited by: russ ]
Re: Furnaces and water heaters
It is a Switch wired to a type T fuse holder, an ssu mounts on a handy box, then you can fuse the appliance to its rating, here in MI we use them for everything, garage door openers, furnaces, hot water heaters, etc. I think every every appliance in MI has one and I cant find it in the code book.
It is a Switch wired to a type T fuse holder, an ssu mounts on a handy box, then you can fuse the appliance to its rating, here in MI we use them for everything, garage door openers, furnaces, hot water heaters, etc. I think every every appliance in MI has one and I cant find it in the code book.
flightline
Senior Member
Re: Furnaces and water heaters
I believe sjaniga is speaking of an "SSY" is the "generic" name for a line of cover mounted Edison based fuseholders mounted on handy and 1900 box covers. This allows for fusing the circuit locally to the appliance [load] at a lower amperage. There is a problem with this in that many of the ones that I have seen are just fused with a 15 or 20 amp plug fuse so not much is really accomplished. I was always taught,[and do], that the best practice is to screw in an "S" type adapter in the proper range, and install a smaller amperage of use, sized to better [and actually] protect the load.
[ March 30, 2003, 08:48 PM: Message edited by: flightline ]
I believe sjaniga is speaking of an "SSY" is the "generic" name for a line of cover mounted Edison based fuseholders mounted on handy and 1900 box covers. This allows for fusing the circuit locally to the appliance [load] at a lower amperage. There is a problem with this in that many of the ones that I have seen are just fused with a 15 or 20 amp plug fuse so not much is really accomplished. I was always taught,[and do], that the best practice is to screw in an "S" type adapter in the proper range, and install a smaller amperage of use, sized to better [and actually] protect the load.
[ March 30, 2003, 08:48 PM: Message edited by: flightline ]
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