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Consumer Unit Replacement2021-01-25T19:58:39+00:00

Consumer Unit Replacement in Shrewsbury & Shropshire

Are you having problems with your old fuse box or worried that it doesn’t meet UK electrical regulations? How do you know when it’s time to replace your fuse box with a modern consumer unit? What’s the cost of replacing that old fuse box and most importantly, how much is the installation of a new consumer unit going to set you back?

If these are some of the questions you need answering, then you’ve come to the right place.


At Shrewsbury Electricians we’ve replaced faulty fuse boxes & installed consumer unit upgrades across Shropshire, from Ludlow to Market Drayton, Shrewsbury, Telford and beyond. So to help you better understand your options, we’ve created this guide to domestic consumer unit replacement.


What’s the difference between a

consumer unit & a fuse box?

A consumer unit and a fuse box both distribute power around your house via a number of electrical circuits.

When there’s a power surge, your consumer unit will instantly shut off the electricity on that circuit via a circuit breaker, we call this ‘tripping’. A tripped circuit breaker is easily identifiable, with the switch being in the OFF position.

Once the cause is identified and resolved, the circuit breaker can be switched back on and the power will be restored.

A fuse box uses a fuse instead if a circuit breaker. When there’s an electrical overload the fuse wire melts, that in turn makes the circuit trip. A consumer board makes fault finding easier because unlike a fuse box, you won’t need to replace the fuse before the power will go on.

Consumer boards are considered a safer, one of the reasons a fuse box is no longer compliant with current electrical regulations.

But should you replace your fuse box with a consumer unit straight away?


Is it time to replace your old fuse box with a modern consumer unit?


Call us: 07307 149170


When should you replace your

fuse box with a consumer board?

There are four main reasons you should replace your fuse box:

  1. Old fuse boxes don’t have RCDs. RCDs are precise, spotting current leakage between 5-30mA and disconnecting in under 300ms. It could save your life.
  2. If you are having issues with sockets or if lights in the house are flickering, it could be a sign that it’s time to install a consumer board.
  3. Some fuse boxes use unsafe materials such as wooden backed fuse boxes or if there are asbestos flash guards installed.
  4. If your fuse box is over 10 years old and it hasn’t been checked since you moved in/bought the property.

Which consumer unit should I choose for my home?

Depending on your electrical needs, Shrewsbury Electricians offer a range of different consumer units to replace your old fuse box. Let’s take a look at the alternatives.

Main Switch

Consumer Unit

Main Switch Consumer Unit

A main switch consumer unit has a single central switch controlling the mains electricity from the meter to the consumer unit. When the power is tripped the switch will move to the off position, and will require manually resetting once the faulty circuit has been identified.

This type of consumer unit is usually found in one storey houses or flats.

Dual RCD Consumer Unit

A dual RCD consumer unit, also known as a residual current device consumer unit, splits a load across two circuits. As opposed a main switch consumer unit, this device makes it possible for part of a house to still have electricity after one of the breakers has tripped.

This unit is ideal for multi-storey homes.

Dual RCD

Consumer Unit

High Integrity

Consumer Unit

High Integrity Consumer Unit

High integrity consumer units are now a very popular choice because it allows all circuits to operate independently. If one circuit goes off, the rest of the house continues to have uninterrupted power.

Still confused about which consumer unit you need?


Call us: 07307 149170


What’s the cost of an

electrical consumer unit?

How much it costs to replace a fuse box with modern consumer unit depends on a) the size of the house and b) how many circuits are involved. In a typical three-bedroom house you might expect six circuits. If there is nothing wrong with the wiring of the property then it will take around 2 hours to install the consumer unit and up to half a day for testing.

We’ve outlined some typical prices below for replacing a consumer unit in Shrewsbury and Shropshire:

Completion Time
6 circuit consumer unit
4-6 hours
10 circuit consumer unit
5-6 hours
12 circuit consumer unit
6-8 hours

Customer testimonials

The team carried out various electrical works at our property all to high standard. We will be definitely using Shrewsbury Electricians again.

Shrewsbury Electricians carried out a test and inspection at my rental property, they arrived on time and were very friendly. I received the certificate the following day.

Chad Wallace

Very pleased with the job. All completed to a high standard. Professional workmen, both reliable and friendly. I would highly recommend Shrewsbury Electricians.

Perry Gregg


Other electrical


Shrewsbury Electricians offer a wide range of support for our domestic and commercial clients in Shrewsbury and Shropshire:


How to choose the right electrician to replace your old fuse box with a consumer unit?

We’re usually able to make all callouts in a timely manner but Shropshire is a big county. On the rare occasion we turn a job down we’ll often get asked ‘can you suggest the best electrician to upgrade my fuse box to a consumer unit?’ We might be able to make a few suggestions of trusted electricians in your area, but if even so, here’s some important points to look out for.

Choosing an electrician to fit a consumer unit checklist

Key things to consider

  • – Public Liability (minimum £2 million)
  • – Professional indemnity (minimum £2 million)
  • – Registered electrician, approved by the Government Part P scheme
  • – Qualified to BS 7671:2008 – 17th Edition
  • – Ask for a written quote including full details of work

  • – Request a reference

  • – Check the quote validity period and if the price includes VAT


We’ll be in touch soon!

Frequently Asked Questions

How long does it take to fit a new consumer unit?2020-10-05T20:10:01+00:00

How long it takes to fit and replace a fuse box with modern consumer unit depends on a) the size of the house and b) how many circuits are involved. In a typical three-bedroom house you might expect six circuits. If there is nothing wrong with the wiring of the property then it will take around 2 hours to install the consumer unit and up to half a day for testing.

Do I need to change my consumer unit?2020-10-05T20:02:27+00:00

You do not need to replace an existing consumer unit unless it is defective or unsuitable for continued use.

Do all MCBs fit all consumer units?2020-10-05T20:02:31+00:00

Not all MCBs fill all installed consumer units, although they should be standard. For domestic consumer units you’ll need type B MCBs, type C are used for loads with high inrush currents.

Where to install a consumer unit?2020-10-05T20:02:36+00:00

BS 7671:2008, document M suggests that consumer units should be installed on a wall so that the switches are between 1350mm and 1450mm above floor level.

How is a consumer unit wired?2020-10-05T20:02:58+00:00

You wire a consumer unit by fixing the live cable into the top of an MCB. The neutral cable is screwed into the RCD neutral terminal block. The earth cable will then be fed into the consumer unit and wired up to the appropriate MCB.

Can I change my own fuse box?2020-11-10T17:37:53+00:00

Changing a fuse box for a modern consumer unit should be performed by a certified professional electrician who is Part P compliant. The replacement board should meet BS 7671:2008 regulations.

Electricians Shrewsbury – What to Expect


BS 7671:2018 – 18th Edition



All documentation available online



£2 million public liability

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