A2 Engineering Services
Why Periodic Electrical Testing?
Periodic electrical testing and inspections of all electrical installations is necessary for the prevention and reduction in general wear and tear on items, corrosion, aging, excessive loading or misuse.
Who asks for tests?
Periodic inspections are often enforced or required as by law, your insurance company, landlord, mortgage provider, licensing authority or public bodies.
What regulations apply to Periodic Testing?
IEE electrical wiring regulations 17th edition (BS7671) require that periodic inspections and testing of electrical installations is carried out at such intervals as are consistent with the type of installation, its use and operation, the frequency of maintenance, and the external influences upon it.
The electrical equipment (safety) Regulation 1994 requires that all mains electrical equipment supplied with the accommodation must be safe.
When to test?
* Commercial installations every 5 years
* Industrial installations every 3 years
* Buildings open to the general public every 1 year
* External installations every 3 years
* Caravan parks once a year
* Fire alarms every year
* Short term installations every 3 months
* Instantly after any damage
* On completion of any alterations or changes of use to a premises
* Instantly when significantly increasing the load to a current circuit
* At the end and start of any new tenancy agreements, to establish a true conditional record
Types of Periodic Tests
Visual Inspection only - inspect for any obvious damage or deterioration of materials and equipment, exposed parts , missing covers, labels, live cables - No power down required.
Visual inspection supplemented by testing - as above plus a thorough inspection of the following:
* The main switch gear and all dis boards
* Fuses and MCB are correctly rated
* Fuses are clean and not over heating
* Conductor terminals and tight and correctly lugged
* Busbar connections are properly made and clamps are tight
* Cable inspections - suitability, condition, fixing, glands, earth connections, any signs of over heating
* Equipment inspections - deterioration, mechanical damage, overheating, condition of flexes, fixings
* Light fitting inspections
* Continuity of circuit protective conductors at all metal accessories and equipment within a 3.5m from floor level and 10% of all light fittings
* Continuity of all bonding conductors and earth clamps
* Continuity of all ring circuits conductors
* Insulation resistance between live conductors
* An electrical separation test
* Polarity at the board and at the final circuit termination
* Earth fault loop impedance
* Test all residual current devices
* The resistance of every earth electrode
* A manual operation test on all MCB, RCD, switch fuses and isolators
* Survey, visual inspection supplemented by testing - as above plus the following information in accordance with IEE regulations 514-09-01
* Distribution board schedule
* Any additional Installation details
* Positions of fixed equipment
This page last modified Monday January 16 08:31:47 PM 2012
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