Sensaphone 1800 - Manual (Page 25)

Chapter 2: Installation
23
Figure 3: Grounding the 1800
Wiring Connectors
The 1800 includes compression-type liquid-tight connectors for
routing wires into the enclosure. To use these connectors, turn
them counter-clockwise to loosen (or open-up) the compression
washer. Insert all cables through the two connectors. When
finished turn them clockwise to secure and seal the 1800
from the outside environment. If you don't have enough
cables to obtain a snug fit you can insert a small piece of soft
PVC insulation or rubber tubing to take up the extra space.