Why is insulation resistance testing performed?

Insulation resistance testing is primarily conducted to detect insulation breakdown and potential safety hazards. This type of testing helps ensure that electrical insulation is functioning correctly and is capable of preventing unintended electrical paths, which could lead to short circuits or electrical shocks. By measuring the resistance of the insulation, technicians can determine if it is sufficiently strong to protect against leakage currents that could cause equipment damage or pose risks to personnel.

When insulation breaks down, the resistance drops, indicating that there could be a serious issue that needs to be addressed. Therefore, the goal of insulation resistance testing is to identify any weaknesses in the insulation that could compromise safety or system functionality, ensuring that the electrical installation operates safely and effectively. This proactive approach is essential in maintaining safe working conditions and preventing accidents that could arise from insulation failures.