We are looking for some direction for NEMA 1 electrical junction box installed in a wood framed 1 hr wall (Ul assembly U305). The wall is a 2x6 wood framed with (1) layer of 5/8 on each side. I cant find any fire rating documents for the junction box.
The box is mounted for the front of our box to protrude 2 inches past the face the wall to allow for surface wiring. Electrical inspector will not allow this installation with additional firestopping measures.
Is there an EJ that would cover this installation?
Hello Brian we can take a look at this in an Engineering Judgment (EJ). Please see below on how to submit an EJ.
Thank you,
Chase Hellan
Sr. Fire Protection Engineer
Hilti is proud to announce the launch of our engineering website, the HILTI CONSTRUCTION PLATFORM (HCP). This platform will be the home for all of your Fire Protection Engineering needs, including Engineering Judgment requests. You can find more information on how to access this new platform here: hilti.com/ej (US) or hilti.ca/ej (Canada.)