Testing of Electrical Installation
Before any testing of low voltage electrical installations (and equipment) is carried out, a detailed physical inspection must be made to ensure that everything is:
1. To a relevant National or Harmonized European Standard
2. Erected/installed in compliance with the IEE Regulations
3. Not damaged in such a way that it could cause danger
General Testing Checklist
1.Connections of Conductors
Are terminations electrically and mechanically sound ? Is installation and sheathing removed only to a minimum to allow satisfactory termination ?
2.Identification of Conductors
Are conductors correctly identified in accordance with the regulations?
3.Routing of Cables
Are cables installed such that account is taken of external influences, such as mechanical damage, corrosion and heat?
4.Conductor Selection
Are conductors selected for current carrying capacity and voltage drop in accordance with the design?
5.Connection of single pole device
Are single pole protective and switching devices connected in the line conductor only?
6.Accessories and equipment
Are all accessories and items of equipment correctly connected?
7.Thermal effects
Are fire barriers present where required and protection against thermal effects provided ?
8. Protection against shock
What methods have been used to provide protection against electrical shock ?
9.Mutual detrimental influence
Are wiring systems installed so that they can have no harmful effect on non-electrical system or so that system of different currents or voltages are segregated where necessary ?
10.Isolation and Switching
Are the appropriate devices for isolation and switching correctly located and installed?
11. Undervoltage
Where under voltage may give rise for concern, are there protective devices present?
12.Protective Devices
Are protective and monitoring devices correctly chosen and set to ensure automatic disconnection and/or overcurrent?
13. Labelling
Are all protective devices, switches (where necessary) and terminals correctly labelled?
14.External influences
Have all items of equipment and protective measures been selected in accordance with the appropriate external influences?
15.Access
Are all means of access to switchgear and equipment adequate?
16. Notices and Signs
Are danger notices and warning signs present?
17.Single line diagrams/Wiring schemes
Are diagrams, instructions and similar information relating to the installation available?
18. Erection methods
Have all wiring systems,accessories and equipment been selected and installed in accordance with the requirements of the regulations? are fixing for equipment adequate for the environment?