What Does an Electrician Do?

An electrician installs, maintains, and repairs electrical systems in homes, businesses, and industrial settings across the UK. They guarantee safety, legal compliance, and the efficient delivery of power.

Responsibilities of an Electrician

Electrical Installation

Electricians install systems such as consumer units (also known as fuse boxes), sockets, switches, lighting circuits, and larger systems, including three-phase installations for commercial use.

Fuse Box / Consumer Unit – The control centre for electrical circuits within a property.
Lighting Installation – Includes interior, exterior, and emergency lighting setups.

Electrical Maintenance and Testing

Electricians perform routine checks and inspections to prevent faults and ensure compliance with standards.

PAT Testing (Portable Appliance Testing) – A method to verify the safety of portable electrical appliances.
Electrical Installation Condition Report (EICR) – A formal document issued after a detailed inspection.

Fault Finding and Emergency Repairs

If electrical systems fail, electricians diagnose and repair issues such as tripped RCDs, burnt-out wiring, or overloaded circuits.

Entity: RCD (Residual Current Device) – Protects against electric shocks by breaking the circuit.
Entity: Circuit Breaker – Prevents overloading and short-circuits.

Types of Electricians and Their Roles

Domestic Electrician

Works in homes, flats, and small residential buildings. Installs standard 230V systems, lighting, sockets, and home automation systems.

Commercial Electrician

Handles complex systems in offices, retail units, and schools. May deal with three-phase power systems, large fuse boards, and structured cabling.

Electrical Contractor vs. Electrician

Entity: Electrical Contractor – A company or individual licensed to run large electrical projects.
Entity: Electrician – A certified technician carrying out the work.

Legal and Regulatory Requirements

Compliance with BS 7671

Electricians in London or all over UK are required to follow the BS 7671 Wiring Regulations, which outline the safety standards for electrical installations.

Certification Bodies

To legally carry out electrical work in the UK, electricians must be certified by recognised regulatory bodies. These organisations ensure compliance with safety standards and verify the competence of electrical professionals.

NICEIC (National Inspection Council for Electrical Installation Contracting)

NICEIC is a UK Government-approved body that certifies electricians and electrical contractors. It assesses electricians for competence, insurance, and adherence to BS 7671 (Wiring Regulations). Electricians registered with NICEIC can self-certify work under Building Regulations.

Part P Compliance

Part P is a section of the Building Regulations that applies to domestic electrical work. Electricians working on fixed electrical installations in dwellings must comply with Part P. It ensures electrical safety in homes and mandates that only certified professionals carry out notifiable work.

Tools and Equipment Used

Electricians rely on a set of specialised tools to carry out safe and efficient work. These tools help diagnose faults, measure electrical values, and perform precision installations.

Multimeter: Measures voltage, current, and resistance in circuits.
Voltage Tester: Checks if wires or components are live.
Wire Stripper: Removes insulation from cables for clean connections.
Conduit Bender: Shapes electrical conduit to fit around structures.
Insulation Resistance Tester: Measures the effectiveness of insulation in preventing current leakage.
Circuit Breaker Finder: Identifies the correct breaker for a given circuit.
RCD Tester: Confirms the proper functioning of Residual Current Devices for safety.
Loop Impedance Tester: Tests the circuit impedance to ensure an appropriate fault clearance.

All tool plays a crucial role in maintaining safety, accuracy, and compliance on the job.

When Should You Call an Electrician?

There are clear signs and scenarios where the expertise of a qualified electrician is required. Failing to address these situations can lead to hazards or non-compliance with legal requirements.

Call an electrician if:

Lights flicker, dim, or buzz unexpectedly
Circuit breakers trip frequently, or RCDs won’t reset
You smell burning near switches or outlets
Sockets or switches feel hot to the touch
You’re planning an extension, renovation, or new build
You’re buying or selling a home and need an EICR
You want to install new sockets, lighting, or EV chargers
Your property has old or exposed wiring
You’re a landlord needing to meet inspection regulations

Early fault detection protects your property and keeps systems compliant with BS 7671 and Part P.

Final Thoughts on the Role of Electricians

Electricians’ Responsibilities and tasks are essential for the safety and functioning of homes and buildings. From new installations to inspections and emergency repairs, their role is defined by skill, regulation, and responsibility.

About Us

Diligent Electrical Contractors – Trusted Electricians in West Norwood, Serving London and Beyond Diligent Electrical Contractors, based in West Norwood, provides reliable and professional electrical services across London and the surrounding areas. Our team of qualified electricians brings between 5 to 25 years of industry experience, ensuring safe, compliant, and high-quality workmanship on every project. We work extensively with housing associations and landlords, and have a proven track record with major clients such as London Underground, the Metropolitan Police, hotels, and other large establishments. Whether it’s domestic, commercial, or industrial electrical work, Diligent Electrical Contractors is your go-to for professionalism

    
 
 
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   Jenny Clarke 
 
 
 
  Chose Diligent Electricals because of excellent reviews. I was not disappointed. Ishmael came at short notice for a trip switch issue. Excellent service, very professional, friendly and informative. Will definitely use again.
  
 
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   Barney Woodbridge 
 
 
 
  Have used DEC twice in the past couple of months - great service, communication and both jobs completely extremely quickly. Don’t need to look anywhere else for an electrician in the area (live around Gipsy Hill station!)
  
 
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   Monica Fyfe 
 
 
 
  Have used Diligent a handful of times now. Ishmael has always been  professional, reliable and we feel reasonably priced. Highly recommend  and we will continue to use!
  
 
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   Tony Gough 
 
 
 
  Ishmael and Russel connected our garden room to the mains, with lighting, sockets, outside light and external power point. In the house they installed 4 additional sockets and a porch light, and replaced the bathroom light. They worked hard and completed everything in a day. I am confident that the work complies with the regulations. Their quote was very reasonable. Recommended, especially if you want work carried out promptly and efficiently.
  
 
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   Daniel 
 
 
 
  Ishmael assessed the job, gave good advice, had expert knowledge and completed the job to a high standard for a good price. I recommend his work
  
 
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   Anna Lubelska 
 
 
 
  Very efficient and professional. I’m a satisfied customer!
  
 
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   Emma Turner 
 
 
 
  Fantastic service, prompt response, diligent approach - respectful and professional. Problem identified, solved, rectified and concluded within a short time frame. Would be happy to recommend based on my experiences.
  
 
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   Niall McDonald 
 
 
 
  Excellent service from start to finish. Ishmael came out to inspect and fix an issue with our fuse box very quickly and diligently. His communication was excellent throughout. A seamless experience, would recommend.
  
 
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   David Pribil 
 
 
 
  Ishmael was professional, efficient, and a pleasure to work with. Excellent service and highly recommended!
  
 
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   Jack Stookes 
 
 
 
  Very impressed with the service provided by Diligent Electrical Contractors! Ishmael was friendly, super helpful and fitted our new bathroom extractor fan quickly and efficiently. Would definitely recommend!