How must the joint between the cables leaving the submersible motor and the feed cables be executed?
Join the feed and earth cables as described in detail in the instructions provided with the jointing equipment, and then measure the connection isolation resistance: min. value with test voltage 500 Vdc in air 5M Omega, in water 2M Omega. The connection must resist the max. pressure it is subjected to, e.g. that exerted by the static level of the water in the well, and the thermal variation due to the duty cycle. N.B.: a poorly executed connection can easily cause damage to the motor and/or power cable.
