ComGas installs additional sockets, circuits and lighting in homes across Farnham and the surrounding area — kitchen and extension circuits, outdoor and garden supplies, and lighting controls — checking the existing consumer unit's spare capacity before any new load is added.
A new socket or circuit has to fit what's already there, not just the wall it's fixed to.
Adding a socket or a circuit looks like a small job from the outside, but BS 7671 requires that any new work doesn't adversely affect the safety of the existing installation. In practice that means checking the consumer unit has a spare way and enough capacity, confirming the earthing arrangement extends properly to the new point, and deciding whether the addition sits on an existing circuit or needs one of its own.
Most additions are straightforward once that's confirmed. Occasionally the check reveals the board itself is the limiting factor — no spare ways, or already close to its rated capacity — in which case we explain that clearly before proceeding, rather than fitting the new work is asked for regardless.
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How we plan sockets, circuits and lighting
New sockets, kitchen circuits, outdoor supplies and lighting — checked against the existing installation.
Every addition starts with what's already installed: the consumer unit's spare capacity, the circuit an addition would join or need, and the environment the new work sits in, whether that's a kitchen, a garden or a ceiling.
Additional Sockets & Circuits
Whether a new socket joins an existing ring or needs a dedicated circuit of its own depends on what it's for and what the circuit already carries.
Additional sockets added to an existing ring circuit where there's genuine spare capacity for the extra load
Kitchen appliances such as cookers, ovens and dishwashers generally need their own dedicated circuit rather than sharing a ring
Extension and loft conversion circuits sized and routed back to the consumer unit as new dedicated circuits
Ring versus radial circuit design decided on cable size, run length and expected load, not fitted the same way regardless
Anything installed outdoors has to cope with weather and moisture as well as carry the electrical load, which changes both the cable and the accessories used compared with an indoor installation.
Outdoor sockets and fittings specified to an appropriate IP rating for their exposure to weather
Outdoor circuits protected by RCD protection as standard
Supplies run to outbuildings, sheds and garden offices as dedicated circuits from the consumer unit
Armoured or suitably protected cable specified for any run buried or exposed outdoors
Lighting circuits and their controls are designed together, because the switching arrangement and the type of fitting both affect what the circuit needs to support.
New lighting circuits and additional points added to existing circuits where capacity allows
Multi-way switching arranged for landings, stairs and larger rooms with more than one access point
Dimmer switches matched to the type of lighting fitted — many dimmers designed for older bulbs aren't compatible with LED fittings without checking
Smart lighting controls wired in as part of the circuit design where requested
Current regulations require that new electrical work doesn't compromise the safety of the existing installation, which is why even a small addition starts with a check of what it's being added to.
Consumer unit spare ways and overall capacity checked before any new circuit is added
Earthing and bonding arrangements confirmed as adequate for the new work
Where the board has no spare capacity, that's identified and explained before anything is quoted
An addition that reveals a wider issue is scoped as a separate, clearly explained piece of work
Why one socket sometimes leads to a bigger conversation
New work isn't allowed to compromise the safety of what's already there.
BS 7671 sets a general requirement that any addition or alteration to an electrical installation must not adversely affect the safety of the existing installation. That single principle is why a request for one more socket sometimes turns into a wider look at the consumer unit — if the board has no spare ways, or the existing circuit is already close to its rated capacity, adding load to it without checking would be exactly the kind of change the regulation is there to prevent.
In practice this affects a small minority of additions. Most homes have some spare capacity, and most single-socket or single-circuit additions are straightforward. But we check first rather than assume, because the alternative — fitting the addition and leaving an overloaded circuit or a board with no protection margin — isn't something we're prepared to do regardless of how small the original request looked.
New electrical work must not compromise the safety of the existing installation
Consumer unit spare capacity is checked before any addition, not assumed
Most single-socket or single-circuit additions are straightforward once checked
Where capacity is a genuine issue, it's identified and explained honestly
Reviews from real ComGas customers, shown as submitted through Google.
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Nick
3 September 2026
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Matt from ComGas Services UK Ltd was very professional, polite, friendly and quick installing a new shower in my bath (and at a better height for me) and a much easier press-in plug for my sink! He left the place spotless. This is the kind of service and installation people dream about - a 5 star service (see photos).
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Laura Peters
17 August 2026
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I have used Comgas twice and both times have been very happy with the service. Very friendly and honest. The most recent time, the job turned out to be a lot bigger than they initially thought but it was no issue and Paul stayed the extra time to make sure the job was done properly! He was really tidy, took a lot of care with the work that was done and took the time to explain what he was doing and why. Pleased to have found a reliable heating company!
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James Ross
8 August 2026
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I had an issue with my boiler and Matt came out to have a look the same day and managed to fix it. Great, professional service. Highly recommend.
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Ian Chevalier
11 June 2026
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First time we've used this company and it won't be the last. Very professional and efficient in everything they do and Matt was excellent in his knowledge and efficiency when dealing with our gas and plumbing problems.
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Karen Flackett
20 May 2026
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Excellent service. Matt came & fitted 2 taps & waste pipes he was polite & friendly & carried out the work efficiently & in a timely manner.
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Paul Norris
30 April 2026
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Fantastic experience from the chaps at ComGas! Special thanks to Matt who removed an old boiler and replaced with a new energy efficient to satisfy the demands of a five bed house with a few bathrooms/baths and showers. The ComGas admin team and Lee were fantastic too on the booking and administration side of things!
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Julie Galvin
21 April 2026
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Here at St Joseph's we have worked with Comgas for a number of years. They have completed big projects and undertake regular maintenance for our school. They price fairly, and their work is completed to a very high standard. All the engineers carry a DBS which makes life so much easier when trying to book an engineer visit.
On the rare occasion that we have an emergency I can trust that Lee will get one of his engineers to respond quickly and efficiently.
Nothing is too much trouble and no job is too small.
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Chesca Haley
16 April 2026
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Lee and the team are amazing! So helpful, so knowledgeable and really look after their customers. Highly recommend.
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Sarah Rogers
6 April 2026
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Absolutely amazing service, always a thorough job and very knowledgable. Really nice guys too. Lee has sorted numerous issues at work and around our house. We have recommended to friends and family who are also very happy
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Alison Molan
25 March 2026
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Lovely engineers, Matt and Jack, were a pleasure to have in the house. Thorough, knowledgeable, tidy and polite. Would highly recommend.
Sockets, circuits and lighting questions
Frequently asked questions.
If you're planning an addition and aren't sure whether your existing wiring can take it, get in touch and we'll check before quoting anything.
Often, yes, provided the circuit has genuine spare capacity for the extra load. We check the circuit and the consumer unit before confirming, rather than assuming it's always straightforward.
Do kitchen appliances need their own circuit?
Generally, yes — cookers, ovens and dishwashers typically draw enough current to need a dedicated circuit rather than sharing a ring with other sockets.
Are outdoor sockets different from indoor ones?
Yes. Outdoor sockets and fittings need an appropriate rating for exposure to weather and moisture, and outdoor circuits are RCD protected as standard.
Can any dimmer switch be used with LED bulbs?
Not always — many dimmers designed for older filament or halogen bulbs aren't compatible with LED fittings and can cause flickering or humming. We match the dimmer to the fitting when specifying lighting controls.
Why would adding a circuit mean the consumer unit needs looking at?
Current regulations require that new work doesn't compromise the safety of the existing installation, so we check the board has a spare way and enough overall capacity before adding a new circuit to it.
Can I add a socket or supply to my garden or shed?
Yes, run as a dedicated circuit from the consumer unit with suitable outdoor-rated cable and accessories, and RCD protection. We assess the route and distance before proposing a specification.
Do you design decorative lighting layouts?
We design and install the electrical circuits and controls for lighting and fit the fittings you choose, but we're not an interior lighting design service — decorative layout and fitting selection is your call, and we'll advise on what the circuit can support.
How many sockets can go on one ring circuit?
There's no fixed number in the regulations — it's governed by the total floor area served and the load actually connected, which is why we assess the specific circuit rather than applying a rule of thumb.
