Emergency Electrician - Hemel Hempstead

Emergency Electrician Hemel HempsteadCBM Electrical Contractors are a locally based company providing an emergency electrician service to Hemel Hempstead and the nearby town of Berkhamsted.

Our team of electrical engineers pride themselves on being 

  • Speedy - they understand that you want the problem resolved quickly!
  • Professional
  • Reliable
  • Courteous - they tidy up before they leave
  • Friendly

One of our team of emergency electricians are always on standby and are available to attend emergency call outs in the Hemel Hempstead area, any time, day or night, throughout the year. We look to have one of our electricians on site looking at your problem within 2 hours of your call. Our vans carry an extensive range of spares and equipment, with the aim of enabling them to deal with most potential issues in one visit.

Call us now on 01707 519056 so we can help you solve your electrical emergency!

A sample of questions we get asked a lot ...

  • The electrical consumer unit (also referred to as the fusebox) is a distribution board consisting of a collection of circuits, alongside a manual mechanism for double pole isolation on the incoming current, plus fuses, RCDs or circuit breakers for automatic current breaking. As its name suggests, these devices are mainly to be found in a domestic setting.

  • An EICR is an Electrical Installation Condition Report, previously known as a PIR. This is a report whose purpose is to ascertain the state of the electrics in a building, clearly stating whether the electrics are in good condition and if not, what remedial work is required to bring the electrics to a satisfactory standard.

  • PAT (Portable Appliance Testing) testing is a vital element of any businesses health & safety policy.
    Portable electrical appliances are responsible for around a quarter of all electrical related safety incidents. The Electricity at Work Regulations require  employers, employees and self-employed persons to abide by these regulations and take sensible and practical measures to ensure that using portable appliances does not create a danger. What this means in practice, is that anyone responsible for the regulations implements a thorough and repeated program of maintaining and inspecting portable equipment. The Health & Safety at Work Act (1974) introduced a legal obligation to carry out such testing as follows;

    • Where portable appliances are used by employees of the business
    • Where portable appliances are provided (e.g. hired out) to third parties
    • Where the members of the public may use such equipment in locations such as schools, hospitals, factories, shops etc.
    • Where portable appliances are fixed or mantained.

    The inspection regime, i.e. the level and frequency of inspections, should reflect the likelihood of the equipment becoming faulty, and should take into account the location where the appliance is being used and the way it is being used.

  • Firstly you need to ensure that the particular piece of electrical equipment is not live, i.e. any source of energy (i.e. usually electricity) has been fully isolated. You also need to ensure that the energy source cannot be accidentally restored before you have finished working on the device. Always ensure that you follow the manufacturers instructions on carrying out any maintenance procedures.

  • Alternating Current (AC) is where the flow of electrons in the current changes direction many times a second, oscillating  back and forth. Direct Current (DC) is where the flow of electrons occurs in only one direction. AC is the type of current most commonly used in households to power domestic electrical appliances whereas DC is most often used to power small portable devices and is the type of current produced by batteries.

  • As with most trades and professions in the UK, electricians have to abide by certain standards and in the case of electricians the relevant standard is BS 7671 (alternatively known as the Institute of Electrical Engineering wiring regulations). This standard lays out minimum standards for the installation of electrical systems if they are to meet national safety standards. It is a condition of membership of NICEIC that all electricians meet this standard.

  • Class III equipment is equipment for which protection against electrocution is provided by Safety Extra Low Voltage (SELV) and in which there is no generation of voltages greater than SELV. The equipment must also be connected to an isolating transformer.  Medical equipment is an example of Class IIl.

  • A piece of equipment capable of carrying and interrupting normal load currents and also carrying and automatically tripping, under defined conditions, abnormal currents such as occurs in short-circuits. An RCD usually operates infrequently although some types are designed for frequent operation.

  • An aggregation of electrical equipment (electric sockets , lights and electric switches) supplied from the same point and protected against surges by the same protective device(s).

  • A Distribution Board is a collection of switches and/or current protective devices (such as circuit breakers, fuses etc) linked to one or several outgoing circuits, being fed by one or several incoming circuits, which includes terminals for neutral and aforementioned protective devices. The Distribution Board may also include controls for signalling.