What is this device on the breaker?

[Welmoed Sisson]

This was on the furnace breaker in this morning's condo. Is it a security device of some kind?

[jakson]

Generally furnaces breaker requires a dedicated circuit of their own to supply the electrical power requirements for the blower and thermostatic controls. A Furnaces breaker can easily install a lock to lock when cb works on the equipment.




Thank you.
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[Mark Lockhart]

lockout tagout device so repairman can safely work on item. See them in industrial plants all the time.

[John Dirks Jr]

Breaker lockout. Usually when you see one, you will not see a service disconnect at the appliance that it serves. Code usually requires either a service disconnect at or within sight of the appliance , or, a breaker lockout device. It's a safety device to protect service personnel. You should have seen a little hole on the breaker lockout where the service tech could put a small padlock.

[Jerry Peck]

Breaker lockout. Usually when you see one, you will not see a service disconnect at the appliance that it serves. Code usually requires either a service disconnect at or within sight of the appliance , or, a breaker lockout device. It's a safety device to protect service personnel. You should have seen a little hole on the breaker lockout where the service tech could put a small padlock.

The use of a lockout at the breaker is okay for basically all appliances except air-conditioning or refrigerating equipment, which requires the disconnect to be within sight from readily accessible from the equipment - within 50 feet straightline sight - nothing is permitted to block the view from the equipment to the disconnect.