Siemens WBBS-R Weatherproof Box

Siemens WBBS-R Weatherproof Box

Consisting of a red-coated finish and part of the Siemens Series of Fire-Alarm Signaling Devices; Siemens WBBS-R is a weatherproof back box for surface mounting Siemens appliances.

The mounting options figures show the maximum number of field wires (conductors) that can enter the back box used with each mounting option.

Although the limits shown for each mounting option comply with the National Electrical Code (NEC). Siemens recommends the use of the largest backbox option and the use
of approved field wires whenever possible to provide additional wiring room for easy installation and minimum stress on the product from wiring.

Check that the installed product will have sufficient clearance and wiring room before installing backboxes and conduit.
Mounting hardware for each mounting option supplied.
Conduit entrances to the back box should be selected to provide sufficient wiring clearance for the installed product.
When extension rings are required, the conduit should enter through the back box, not the extension ring. Use Steel City #53151 (1-1/2” deep) or #53171 (2-1/8” deep) extension rings (as noted
in the mounting options) or equal to the same cut-out area.
When terminating field wires, do not use more lead length than required. Excess lead length could result in insufficient wiring space for the appliance.
Use care and proper techniques to position the field wires in the back box. So that they use minimum space and produce minimum stress on the product.

Siemens WBBS-R Weatherproof Box

This is especially important for stiff, heavy gauge wires and wires with thick insulation or sheathing.
Do not pass additional wires (used for other than the appliance) through the back box. Unless the back box is of sufficient size to permit additional wiring as described in
NEC 314.16 (B). Such additional wires could result in insufficient wiring space for the appliance.