Electrical Installation Inspection

Posted on: August 1, 2016
By: Alan O'Neill
Posted in: Electrician

Electrical Installation Inspection: Houston Homeowners Need to Inspect their Electrical Installations

Electrical installations are essential to a property and a major part of any construction project. Improperly executed, the influence of age and exposure to wear and tear, the installation might pose a security risk or might cause a fire.

We need to Install our home appliances and Inspect it with experts.

Inspection of Electrical Installations

Electrical Safety Inspection items classified as ‘requiring urgent attention’ means the safety of those using the installation may be at risk. Arrangements should be made for a qualified electrician to undertake the necessary remedial work without delay

Insurance companies often require a regular inspection of the electricity facilities and installations to minimize the risk of fire, accident and down-time in operations caused by malfunction of your electrical installation.

We conduct inspections with experienced and certified engineers. During the inspection we make sure that the facility has not been affected by usage and age, and that it has been taken care of in a good way and measures up to legislation and safety demands. 

The pre-commissioning electrical tests and visual-inspection checks for installations in buildings include, typically, all of the following:

  • Electrical continuity and conductivity tests of protective, equipotential and earthbonding conductors
  • Insulation resistance tests between live conductors and the protective conductors connected to the earthing arrangement
  • Test of compliance of SELV (Safety Extra Low Voltage) and PELV (Protection by Extra Low Voltage) circuits or for electrical separation
  • Insulation resistance/impedance of floors and walls
  • Protection by automatic disconnection of the supply

– For TN, by measurement of the fault loop impedance, and by verification of the characteristics and/or the effectiveness of the associated protective devices (overcurrent protective device and RCD)
– For TT, by measurement of the resistance RA of the earth electrode of the exposed-conductive-parts, and by verification of the characteristics and/or the effectiveness of the associated protective devices (overcurrent protective device and RCD)
– For IT, by calculation or measurement of the current Id in case of a fist fault at the line conductor or at the neutral, and with the test done for TN system where conditions are similar to TN system in case of a double insulation fault situation, with the test done for TT system where the conditions are similar to TT system in case of a double insulation fault situation.

  • Additional protection by verifying the effectiveness of the protective measure
  • Polarity test where the rules prohibit the installation of single pole switching devices in the neutral conductor.
  • Check of phase sequence in case of multiphase circuit
  • Functional test of switchgear and controlgear by verifying their installation and adjustment
  • Voltage drop by measuring the circuit impedance or by using diagrams

All tests and examinations must be carried out on the installation before an electrical certificate of compliance is issued by the electrical worker. The installations must not be energised before an electrical certificate of compliance is completed.When testing an electrical installation for compliance: If a test fails, all preceding tests that may have been influenced by the fault must be repeated after the fault is rectified and all parts of the installation such as switchboards, sub-mains or outbuildings must be inspected and tested for a full verification of the installation. Call us (713) 812-7070 for your home service and repair needs.

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