Cable entry into a Class One Division One Group C and D Hazardous-Location pump has its share of issues depending on your perspective.
It concerns mechanical engineers because every penetration is an opportunity for effluent to get into the motor
It concerns electrical engineers because modern pumps need more monitoring, sensing and control features than ever- meaning more cables
It concerns certification managers as every jurisdiction seems to have their own requirements for cable entry
It concerns manufacturing managers because it is a slow, messy and trade-craft sensitive process that takes up a great deal of valuable floor space.
It concerns packaging and logisticians because there is no good way to protect the wired pump in transit- and if the cable gets damaged, the pump goes back for factory service
It concerns customers because their new project needs to be safe, reliable and on time
#18 AWG 5 Conductor- uses UL Type SOOW cable
#14-10 AWG 4 Conductor- uses UL Type SOOW cable
#8-6 AWG 4 Conductor- uses UL Type W cable (up to 70A)
High Visibility tag says “Do Not Disconnect Under Load”
Cable to molded plug interface becomes homogenous
Coupling nut retention feature- set screw keeps the coupler thread locked in position
Epoxy sealing inside motor is impervious to motor-off gassing (due to hot wire insulation of varnish) of seepage from effluent
High temperature Teflon Lead wire- also chemically impervious to solvents, and offer very high temperature resistance
up to 240A