Yep not only allowed it is required if you have hvac in the attic very common here.
Do receptacles in the attic have to be gfci.
Chapter 2 of the national electrical code nec does not specifically exclude outlets.
Is that true in cases where there s hvac equipment in the attic.
Gfci receptacles are required in bathrooms garages crawl spaces basements laundry rooms and areas where a water source is present.
Where gfcis are required.
No requirement that it be gfci either.
The nec requires that all outlet receptacles in a bathroom be gfci protected.
Gfci protection can be provided by a gfci receptacle one receptacle will protect others downstream in the circuit and the other protected receptacles should be marked as gfci protected a gfci circuit breaker in the electric panel or a gfci dead front often used for indoor spa tubs and mounted on the wall in the bathroom or.
Gfci protection is required for 125 volt to 250 volt receptacles supplied by single phase branch circuits rated 150 volts or less to the ground.
Gfci protection is designed to prevent the shocks that might occur when a ground fault occurs and it can be provided by special gfci outlet receptacles or by a gfci circuit breaker that protects the entire circuit.
The nec requires gfcis on all exterior and bathroom receptacles.
Older homes are not required to have gfci outlets unless the wiring is being updated but it s a good idea to install them anyway.