Cable Insulation Resistance Test Report Format

Since 80 of electrical maintenance and testing.

Cable insulation resistance test report format.

The method of measuring the insulation resistance is to test and assess the state of the isolation head and body. Applied potential shall be 500 volts dc for 300 volt rated cable and 1000 volts dc for 600 volt rated cable. 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.

Test duration shall be one minute. The insulation resistance is the resistance in ohms of wires cables and electrical equipment. 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. The continuity test can be made in 2 or 4 wires according to the resistance to be measured.

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. 2 wires for resistances 1 ω and 4 wires for resistances 1 ω. Perform insulation resistance test on each conductor with respect to ground and adjacent conductors. The meggering should be carried out at initial stages before and after cable laying.

Insulation resistance testing purpose. Insulation resistance decreases in temperature or moisture. Insulation resistance testing is a non destructive test procedure. The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and.

Also acceptable values of insulation resistance depend upon the equipment you re testing. Templates test reports forms tags. For maintenance purposes these tests shall be performed periodically. Perform resistance measurements through bolted connections with low resistance ohmmeter.

The test measures the insu lation resistance between the phases and or between phase and ground. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs. It is important to guard against electric shocks and avoid equipment damage from accidental discharges. This test is used to detect conductor insulation damage that may have been caused during installation.

An insulation resistance test is typically performed on de energized wire and cable immediately after installation and before termination to any equipment or accessories. Historically many field electricians use the somewhat arbitrary standard of 1 megohm per kv.