Cable Insulation Resistance Test Report Format

Meggering of signalling cable is done to test the continuity and insulation of the cable conductors.

Cable insulation resistance test report format.

Historically many field electricians use the somewhat arbitrary standard of 1 megohm per kv. Applied potential shall be 500 volts dc for 300 volt rated cable and 1000 volts dc for 600 volt rated cable. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. The insulation resistance is the resistance in ohms of wires cables and electrical equipment.

For maintenance purposes these tests shall be performed periodically. Continuity test report insulation resistance test form ir test sheet test sheets post navigation battery autonomy test report for fire alarm system testing commissioning report smdb. Since 80 of electrical maintenance and testing. The continuity test can be made in 2 or 4 wires according to the resistance to be measured.

This test is used to detect conductor insulation damage that may have been caused during installation. Perform insulation resistance test on each conductor with respect to ground and adjacent conductors. Insulation resistance testing is a non destructive test procedure. Insulation resistance testing purpose.

The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. An insulation resistance test is typically performed on de energized wire and cable immediately after installation and before termination to any equipment or accessories. Perform resistance measurements through bolted connections with low resistance ohmmeter.

Insulation resistance decreases in temperature or moisture. The method of measuring the insulation resistance is to test and assess the state of the isolation head and body. It is important to guard against electric shocks and avoid equipment damage from accidental discharges. Templates test reports forms tags.

The test measures the insu lation resistance between the phases and or between phase and ground. The continuity test also called low resistance measurement is measuring the low resistance of cables from 1 mω to 250 ω. With a little record keeping and common sense however you can get a good picture of the insulation condition from values that are only relative. The meggering should be carried out at initial stages before and after cable laying.

2 wires for resistances 1 ω and 4 wires for resistances 1 ω. Also acceptable values of insulation resistance depend upon the equipment you re testing.