Industrial Switchgear Enclosures

UK-made, containerised switchgear rooms engineered for safety, uptime and compliance.

Protect LV and HV infrastructure with containerised industrial switchgear enclosures purpose-built to your specification. S Jones Conversions design turnkey switchgear housings with secure access control, engineered climate management and precise cable routing – keeping critical power online.

Why choose containerised switchgear?

  • Faster delivery and install – built off-site, tested, and delivered fully assembled to minimise downtime. 
  • Cost control – predictable pricing and fewer site prelims than brick-built alternatives. 
  • Scalable and relocatable – add capacity or move as your site evolves. 
  • Safer build – controlled workshop environment with consistent QA.
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Large green switchgear enclosure with personnel doors and cargo doors closed, positioned in an industrial yard between workshop buildings
Two green converted switchgear enclosures positioned side by side in an industrial yard. One unit features large louvred ventilation panels on the cargo doors, while the other has solid cargo doors and a personnel access door on the side.
White converted switchgear enclosure elevated on a concrete platform, accessed by metal staircases and railings. The unit features a personnel door, external lighting, ventilation grills, and an external air conditioning unit.
Blue containerised switchgear enclosure with large louvred ventilation panels on the cargo doors and a personnel access door on the side, positioned on a concrete yard.
Silver converted switchgear enclosure with a personnel access door, external ventilation louvres, and mounted service connections, positioned in an industrial yard
Interior of a switchgear enclosure with insulated grey walls, ceiling lighting, surface-mounted electrical conduits, and a dual-fan ventilation mounted at the far end.
Interior of a containerised switchgear enclosure containing white electrical control cabinets, insulated walls, ceiling lighting, wall-mounted conduits, and a dual-fan ventilation unit at the far end.

Key Features & Specification of Our Containerised Switchgear Rooms

  • High security – Contain-A-Lock® anti-tamper locking and secure access options. 
  • Thermal management – calculated airflow with filtration; fans, louvres, ducting and HVAC integration. 
  • Fire-rated construction and sealed penetrations for dust, water and fire resistance.
  • Compliant electrical setup – factory-fitted to your specification and relevant regulations (e.g., IP ratings, earthing, emergency egress). 
  • Custom finish – any RAL colour; external labelling and safety signage. 
  • Footprints – 10ft, 20ft, 40ft or custom. Multi-compartment layouts (LV, HV, UPS, MCC). Reinforced floors, cable trays, trunking, gland plates and plinths.

What you get with S Jones Conversions 

  • Experienced engineers and a production facility. 
  • 3D CAD modelling and GA drawings for approval before fabrication. 
  • In-production visits and British manufacturing standards. 
  • Nationwide UK delivery—arrives fully assembled and ready to position. 
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Delivery, offloading & commissioning 

We arrange delivery, crane or HIAB offloading, positioning and method statements.

Pre-commissioning checks and on-site fit-out support available. FAT to your test plan. 

Local & national projects 

Serving London, Birmingham, Manchester, Leeds, Bristol, Glasgow, Newcastle.  

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Talk to an engineer or request a fast, tailored quote.

Blue containerised switchgear enclosure with large louvred ventilation panels on the cargo doors and a personnel access door on the side, positioned on a concrete yard.

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FAQs

What is a containerised switchgear enclosure and why choose one over a brick-built switchroom?

A containerised switchgear enclosure is a purpose-built, steel structure that houses LV/HV switchgear and related equipment. Compared with brick-built rooms, it delivers faster, off-site manufacture, predictable cost, and minimal site disruption. Units arrive fully assembled, pre-tested and ready to position, with engineered ventilation/cooling, sealed penetrations and secure access control. For programmes that demand speed, quality assurance and easy relocation or expansion, containerised industrial switchgear enclosures are the most practical option.

How do you ensure safety, compliance and reliability?

Enclosures are engineered to your specification and relevant UK/international requirements, including ingress protection (IP), earthing/bonding, fire-rated construction and emergency egress. We provide 3D CAD/GA drawings for approval, apply controlled factory QA, and offer Factory Acceptance Testing (FAT) to your test plan, with witness options. Sealed cable/pipe entries, anti-tamper Contain-A-Lock®, and clearly labelled interfaces support safe installation and operation. Documentation (method statements, risk assessments) is available for on-site works.

How is heat, ventilation and climate control handled for LV/HV switchgear?

We calculate project heat loads, then design intake/exhaust paths with filtration to protect components and maintain uptime. Depending on your environment and equipment, we integrate fans, louvres, ducting and HVAC connections for precise climate control. Options include thermostatic control, environmental monitoring, condensate management and acoustic treatment. The result is a thermally stable switchgear housing that supports equipment longevity and performance in demanding conditions.

What sizes and options are available—and what’s included in a quote?

Standard footprints are 10ft, 20ft and 40ft, with custom dimensions available. Layouts can be single or multi-compartment (LV, HV, UPS, MCC), with reinforced floors, cable trays/trunking, gland plates, plinths and your choice of RAL finish. Quotes typically cover design, CAD approvals, fabrication and fit-out, factory testing and nationwide UK delivery with crane/HIAB offloading if required. Share your equipment list, single-line diagram and target date to receive a fast, tailored proposal.

Some of Our Valued Customers

What Our Customers Say

Patrick26th November 2025

Unfortunately our delivery was delayed by several hours but the driver made up for lost time, he was very polite and proffessional and sited the container inch perfect.

Rose25th November 2025

I was treated extremely well they took care of what I needed without any fuss.

Nancie24th October 2025

I cannot thank the staff at S Jones Containers enough. Everyone I spoke to went over and above to help. The containers were ordered and delivered in a very timely manner. We were kept informed at all times. The containers arrived at the time expected and were very easy to install. Thank you to everyone at S Jones Containers. I would highly recommend this company, it was a pleasure doing business with them.

Christine1st August 2025

Shazia was helpful from my first enquiry to the delivery of my container. She sorted any query and enabled me to buy exactly what I was looking for. The driver who delivered container was also a credit to his company. Nothing was too much trouble and everything done with a smile .

Phil20th June 2025

Got in touch with Shazia at the depot she organised everything delivery was a bit worrying as the area was tight but the delivery guy was amazing and got them exactly where we wanted them ,, all a very good service provided