At CWH Electrical Services we are big enough to manage your commercial installation, whist being small enough to still care! 


Contact CWH Electrical Services  for a survey and a free no-obligation quote.


  • Sub main circuits
  • Low bay lighting
  • C.C.T.V. installation 
  • Office CAT2 lighting
  • Exterior floodlighting
  • Door entry system
  • Storage heating
  • Skirting trunking
  • Commercial kitchens
  • Display lighting
  • Over door, down flow heaters 
  • Portable Appliance Testing (PAT)
  • Emergency lighting to BS5266-1:1999
  • Dado trunking and CAT5 data cabling
  • Networking and IT solutions
  • Fire and Smoke Alarm Systems
  • Raised access floor trunking installations
  • Security systems and intruder alarms
  • Marinas
  • Restaurants

An Introduction To Pat Testing

Pat testing or portable appliance testing is an important part of any health & safety policy. 

The Health & Safety Executive (HSE) states that 25% of all reportable electrical accidents involve portable appliances. The Electricity at Work Regulations place a legal responsibility on employers, employees and self-employed persons to comply with the provisions of the regulations and take reasonable practicable steps to ensure that no danger results from the use of such equipment. This in effect requires the implementation of a systematic and regular program of maintenance, inspection and testing. The Health & Safety at Work Act (1974) places such an obligation in the following circumstances:

  1. Where appliances are used by employees.
  2. Where the public may use appliances in establishments such as hospitals, schools, hotels, shops etc.
  3. Where appliances are supplied or hired.
  4. Where appliances are repaired or serviced.

What Does The Law Say about M/Pat Testing?

*Regulation 4(2) of the Electricity at Work Regulations 1989 says; 

‘As may be necessary to prevent danger, all systems shall be maintained so as to prevent, so far as is reasonably practicable, such danger’. 

*HSE. (2011). Maintaining portable electric equipment in offices and other low-risk environments. Available: Last accessed 05th March 2012.