Cable Insulation Test Form

A cable insulation test is basically a continuity test so the power to the circuit must be off.

Cable insulation test form.

The insulation resistance is the resistance in ohms of wires cables and electrical equipment. This type of test is a form of preventative maintenance. During testing all cables and wiring must be completely disconnected from any equipment. Low insulation of cable leads to inadvertent energisation or de energisation of circuits.

The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Insulation resistance testing is a non destructive test procedure. Insulation resistance testing purpose. Either turn off the breaker or if you re testing the wiring in a piece of equipment unplug it.

It is important to guard against electric shocks and avoid equipment damage from accidental discharges. For maintenance purposes these tests shall be performed periodically. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. For good insulation the resistance usually reads in the megohm range.

For good insulation the resistance usually reads in the megohm range. Locate the connection point of the wire or cable you want to test so you have access to the exposed conductors. The meggering should be carried out at initial stages before and after cable laying. If the insulation resistance falls below an accepted user dictated value or falling rapidly over time then cable.

The test measures the insu lation resistance between the phases and or between phase and ground. The megger insulation tester is essentially a high range resistance meter ohmmeter with a built in direct current generator. Each core to ground continuity point to wire check with low voltage tester check correct installation of cable glands check cable identification tags check that. Between signal wires 2.

The insulation condition from values that are only relative. Screens shall be checked as common conductors. Clamp the alligator clip on one of the. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms.

Maintenance insulation resistance testing can be performed on a regular basis and the collected data used to indicate if the conductor insulation is deteriorating over time. The megger insulation tester is essentially a high range resistance meter. Because electrical insulation will exhibit dynamic behavior during the course of your test.