- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
The ABB one I looked at was $330 list
UL relays
- Thread starter Open Neutral
- Start date
- Status
Open Neutral
Senior Member
- Location
- Inside the Beltway
- Occupation
- Engineer
> $330
I'm in conversations with a smaller company; they may be able to fill the need.
I'm in conversations with a smaller company; they may be able to fill the need.
Open Neutral
Senior Member
- Location
- Inside the Beltway
- Occupation
- Engineer
UL low voltage relevence
UL low voltage relevence
Revisiting this, the panel construction shall be done by a panel builder or the jobsite electrician. The sole components will be the Struthers-Dunn 450-seres 24 VAC coil, UL-relays, Square-D contactors, DIN rail, and wires. Those relays do switch line voltage.
Those relay coils are being controlled by a separate control box, one with no line voltage within it; it runs on my kind of supply voltages: 24VDC, 5VDC, and even 3.3VDC, if you count the processor buss....
Internal relays switch the external 24VAC to run the aforementioned relays in the separate box. There's an adjacent UL-labeled 2.5A float charger that will float the control box batteries.
So what if anything does UL have to do with that control box? What little I know is superficial: I always thought that if it fit under Class II (as I believe it does...), that was good enough.
One electrician says the box "Must meet UL..." but it's not clear what his basis it. The PE signing off on the project has not yet addressed this specifically, but included it in all the plans to date. (We're seeking an audience.....)
What comments do the Wise Men here have to offer?
UL low voltage relevence
Revisiting this, the panel construction shall be done by a panel builder or the jobsite electrician. The sole components will be the Struthers-Dunn 450-seres 24 VAC coil, UL-relays, Square-D contactors, DIN rail, and wires. Those relays do switch line voltage.
Those relay coils are being controlled by a separate control box, one with no line voltage within it; it runs on my kind of supply voltages: 24VDC, 5VDC, and even 3.3VDC, if you count the processor buss....
Internal relays switch the external 24VAC to run the aforementioned relays in the separate box. There's an adjacent UL-labeled 2.5A float charger that will float the control box batteries.
So what if anything does UL have to do with that control box? What little I know is superficial: I always thought that if it fit under Class II (as I believe it does...), that was good enough.
One electrician says the box "Must meet UL..." but it's not clear what his basis it. The PE signing off on the project has not yet addressed this specifically, but included it in all the plans to date. (We're seeking an audience.....)
What comments do the Wise Men here have to offer?
- Status