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UL 10c 1 hr label on mag locks, or only UL label with no time listed

SBayes

Registered User
Joined
Jun 4, 2021
Messages
1
Location
Indiana
Door inspector called out UL 10c 1 hr label on mag locks installed on 90 min opening protectives. Also called out another model mag lock that has UL label with no time listed on a 45 min opening. What exactly do these two labels tell me and what openings are they actually rated for?
 

LGreene

Registered User
Joined
Oct 20, 2009
Messages
1,126
Location
San Miguel de Allende, Mexico
If there is a time limit stated on the UL 10C label, that's the maximum rating of the fire door assembly that the product can be used on. If there is no time shown on the UL 10C label, it usually means that the product is listed for the maximum fire door rating (usually 3 hours), but you should check the lock manufacturer's listing info to be sure.

If it's another type of UL label, not UL 10C, that label would not indicate that the product can be used on a fire door assembly. For example, the lock might be listed to UL 294 or UL 1034, but if it's going on a fire door, the UL 10C label would also be needed.
 

cda

Sawhorse 123
Joined
Oct 19, 2009
Messages
20,361
Location
Basement
Well that is interesting

Did not know mag locks carried a UL 10C listing
 

LGreene

Registered User
Joined
Oct 20, 2009
Messages
1,126
Location
San Miguel de Allende, Mexico
Well that is interesting

Did not know mag locks carried a UL 10C listing

:cool:
 

cda

Sawhorse 123
Joined
Oct 19, 2009
Messages
20,361
Location
Basement
Ok

Thank you

Have not done locks on a rated door in a long time,,,, But will check next time!!!
 
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