SJI Electrical provides professional consumer unit and fuse board upgrades — we're based in Paisley and cover Lochwinnoch along with the rest of Renfrewshire and the wider Greater Glasgow area.
The consumer unit is the central control point of your property's electrical system, and an outdated board is one of the most common reasons homeowners get in touch.
Three quick questions, then it goes straight to SJI on WhatsApp.
In a village whose core was planned from 1788 and has been conservation-designated since 1972, the consumer unit is very often much younger than the house around it — fitted, replaced or added to at some point in the property's long life, by whoever was working there at the time. An older-style board is not automatically unsafe, and we won't tell you it is. It is, though, the single most common thing that prompts an enquiry, and it's a quick thing for us to look at and give you a straight answer on either way.
Every upgrade follows the same structured process, from safe isolation through to certification.

The existing supply is safely isolated and the current circuits inspected before any work begins.

The existing fuse board is removed once the inspection and the plan have been agreed with you.

A modern consumer unit is installed, improving circuit protection, capacity and organisation.
Also part of a full rewire →
Full system testing is carried out and certification issued once the upgrade is complete.
Most installations are completed within one day, depending on the property. That matters more than usual somewhere like Lochwinnoch: it means one agreed date, one visit out from Paisley, and the property back to normal by the end of it rather than a job that drags across a week. We'll confirm timing clearly when we quote so you know what to expect on the day.
We make sure you understand every stage before work begins.
Send us the details of your Lochwinnoch property and what's prompting the upgrade.
Inspection of the existing installation, with the findings explained clearly.
A written quotation provided before anything is agreed.
An installation date agreed that works for you.
Professional installation, followed by full testing and certification.
Based in Paisley and providing fuse board upgrades across Renfrewshire and the wider Greater Glasgow area:
Most installations are completed within one day, depending on the property. We'll confirm the timing when we quote.
Sometimes the board is the right job on its own, and sometimes it's part of a bigger picture. We inspect the existing circuits first and tell you honestly which of the two you're looking at rather than fitting a new board over a problem.
Common signs include an older-style board still fitted, faults or frequent tripping, planned renovation work, preparing a property for rental, or wanting improved safety protection. We can inspect and advise.
The supply is safely isolated before any work begins, so there is a period without power on the day. Full system testing is carried out before we hand the property back to you.
Yes. Every fuse board upgrade includes full system testing, and certification is issued once the work is complete.
Yes. Lochwinnoch is within the Renfrewshire area we cover from Paisley. Because it's a scheduled, planned job on an agreed date rather than a call-out, a single upgrade is straightforward to arrange.
If your Lochwinnoch property still has an older-style fuse board, or you're preparing for renovation or a new tenancy, contact SJI Electrical to arrange an inspection. We'll look at the existing installation, explain what we find in plain terms, and give you a written quote before anything is agreed.