Introduction
National Electrical Code Compliance
9
Sensor and Probe Junction Boxes
Weatherproof electrical junction boxes with a gasketed cover are required on the end of each probe and sensor
conduit run at the manhole or monitoring well location. Gasketing or sealing compound must be used at each entry
to the junction box to ensure a waterproof junction. The interior volume of each junction box must be a minimum of
16 cubic inches.
Veeder-Root recommends the following junction boxes or equivalent:
• Appleton Electric Co. - JBDX junction box, JBK-B cover, and JB-GK-V gasket.
• Crouse-Hinds Co. - GRFX-139 junction box, GRF-10 cover, and GASK-643 gasket.
