We are seeking experienced Wiremen to join a major National Grid project in Melksham, supporting the installation, wiring, refurbishment and testing of electrical systems within high-voltage substation environments.
Working as part of a specialist electrical team, you will be responsible for carrying out high-quality panel wiring, control wiring and electrical installation works while ensuring all activities are completed safely, efficiently and in accordance with National Grid standards and project specifications.
This is an excellent opportunity to work on a major UK energy infrastructure project with a well-established engineering contractor.

Key Responsibilities

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  Carry out panel wiring, control wiring and electrical installation works within National Grid substations.
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  Install, terminate and connect electrical cabling in accordance with engineering drawings and specifications.
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  Assist with the installation, refurbishment and commissioning of electrical equipment.
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  Wire and connect a range of National Grid equipment, including:
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    AIS and GIS Switchgear
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    Protection Relay Panels
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    LVAC Boards
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    Battery Systems
  • 
    Transformers
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    Circuit Breakers
  • 
    Disconnectors
  • 
    Earth Switches
  • 
    Current Transformers (CTs)
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    Voltage Transformers (VTs)
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    Telecommunications Equipment
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    Marshalling Kiosks
  • 
    Supplies Pillars
  • 
    Blockhouses
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  Read and interpret electrical schematics, wiring diagrams and layout drawings.
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  Carry out cable routing, glanding and termination to a high standard.
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  Support testing, fault finding and commissioning activities where required.
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  Maintain accurate records of completed work.
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  Ensure all work complies with National Grid standards, Health & Safety legislation and company procedures.
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  Maintain high standards of housekeeping and safe working practices.
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  Work collaboratively with supervisors, engineers and project teams to deliver works safely and efficiently.

Essential Skills & Experience

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  Previous experience working as a Wireman within National Grid, HV substations or industrial electrical environments.
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  Experience with panel wiring, control wiring and electrical installation.
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  Strong understanding of electrical drawings and wiring schematics.
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  Experience installing and wiring:
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    Protection Relay Panels
  • 
    LVAC Boards
  • 
    Switchgear
  • 
    Transformers
  • 
    Battery Systems
  • 
    Control Panels
  • 
    Marshalling Kiosks
  • 
    Telecommunications Equipment
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  Experience carrying out cable glanding and termination.
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  Understanding of safe systems of work within high-voltage environments.
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  Strong attention to detail and commitment to quality workmanship.
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  Ability to work effectively as part of a team.

Essential Certifications

Candidates must hold the relevant National Grid authorisations and site competencies applicable to the project.
Ideally applicants will also hold:

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  National Grid Person (NG Person)
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  National Grid Competent Person/Authorised Person (where applicable)
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  ECS or CSCS Card
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  Manual Handling
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  Relevant Electrical Qualifications
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  Appropriate PPE for site attendance

Personal Attributes

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  Safety-conscious with excellent attention to detail.
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  Reliable and dependable.
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  Strong communication and teamwork skills.
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  Positive, proactive and adaptable.
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  Able to work efficiently under pressure while maintaining high standards of workmanship.
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  Committed to delivering quality installations in accordance with National Grid requirements.

What's on Offer?

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  £30.00 per hour
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  50-hour working week.
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  Contract running until 18th December 2026.
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  Opportunity to work on a major National Grid infrastructure project.
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  Join a highly skilled electrical team delivering critical UK energy infrastructure.

This role is ideal for experienced Wiremen with National Grid substation experience who are looking to join a long-term contract on a high-profile infrastructure project. Candidates with the required National Grid experience and electrical installation expertise are encouraged to apply.