What Kind Of Cable Was This?

[infinity]

he must not be the only one because if you look in the old 2017 code handbook its the example in exhibit 725.3 :
Typical installation of an automatic oil burner unit for a boiler employing a safety shutdown circuit required to be Class 1.
View attachment 2578953

Nice graphic. I never thought of the toggle switch ahead of the actual safety control devices to be part of the Class 1 portion of the circuit. Following this graphic is does make sense that they may be part of the safety requirement.

 

[Joethemechanic]

I'm just thinking. Where exactly does this emergency switch have to be? One of my stoker boilers is an EFM DF520. DF is for dual fuel. It's all set up to run on coal or oil but I just never got around to installing the oil burner gun. If I do install it should the switch just be outside the boiler room, or in my downstairs office? I kind of think I should install a second switch because there is also a door between the boiler room and the shop.

Actually I have a burner gun here that can burn oil, or propane, that is probably the one I'm going to put in although I don't have any propane storage here. at least not yet

 

[hbiss]

AFAIK there is nothing that says you can't have more than one. If the boiler is in the basement, there needs to be one at the top of the stairs from the first floor. I like to put another outside the boiler room door. All should be at about 5' AFF with a red plate that says "Oil Burner Emergency Switch". You use a toggle even though the rest of the house may be Decora.

-Hal