What a DB box actually does
Your distribution board (DB box, also called a consumer unit) is the central panel that takes the incoming supply and splits it into the circuits around your home. It is where your main switch, MCBs, and earth leakage protection all sit. When it is set up correctly, it cuts the power the instant something goes wrong, protecting your family and your appliances. When it is old, overloaded, or faulty, it can trip for no clear reason, fail to protect you, or become a fire risk.
- Main switch: isolates the whole flat so work can be done safely.
- MCBs (miniature circuit breakers): protect each circuit against overload and short circuits.
- RCCB or ELCB: cuts the supply the moment it senses earth leakage that could cause a shock.
- Earth bonding: ties metal parts to earth so a fault has a safe path to follow.
Signs your DB box needs attention
A distribution board does not last forever, and an older or undersized one can quietly put your home at risk. Call us if you notice any of the following.
- Breakers that trip often or will not stay on after you reset them.
- A burning smell, scorch marks, or a warm panel near the DB box.
- Buzzing, crackling, or flickering lights when appliances switch on.
- An old board with rewireable fuses instead of MCBs, or no RCCB at all.
- Not enough ways (spare slots) to add the circuits a modern home needs.
DB box work we carry out
We handle the full range of distribution board work, from a single faulty breaker to a complete consumer unit upgrade, all to HDB guidelines for electrical works and Singapore's electrical standards.
- Full DB box and distribution board replacement, with a modern board sized for your home.
- MCB supply and replacement for individual circuits that trip or have failed.
- RCCB and ELCB installation to bring your earth leakage protection up to standard.
- Earth bonding to protect metal fittings in bathrooms, kitchens, and wet areas.
- Adding spare ways and dedicated circuits for new appliances or renovations.
HDB DB box work, done right
HDB flats have their own configurations and approval requirements, and we know them well. As EMA-licensed electricians (LEW) familiar with HDB requirements, we replace and upgrade HDB distribution boards in line with HDB guidelines for electrical works. Older flats often have a lower main-switch rating, while newer or upgraded blocks have higher loading, so we make sure any upgrade matches your supply and the load your household actually runs. Where a Licensed Electrical Worker (LEW) certificate is required, we provide it on completion.
Honest pricing for your DB box
We keep pricing transparent with no hidden fees. As a guide, a single-phase 40A 18-pole MCB and DB box replacement starts from S$450, and earth bonding starts from S$50. Final cost depends on your board, your flat's wiring, the number of circuits, and whether any extra work is needed to meet current standards. After we assess your setup, we give you a clear, itemised quote, and we never start without your approval.
Frequently asked questions
What is the difference between a DB box, a distribution board, and a consumer unit?
They are different names for the same thing: the central panel that splits your incoming supply into circuits and houses your main switch, MCBs, and earth leakage protection. In Singapore homes you will most often hear DB box or distribution board. A consumer unit is the same panel in a domestic property.
How do I know if my distribution board needs replacing?
Common signs are frequent tripping, breakers that will not stay on, a burning smell or warm panel, buzzing, or an old board with rewireable fuses and no RCCB. Older boards may also lack the spare ways a modern home needs. We start with an assessment, and if a full replacement is not necessary, we will tell you.
Can you upgrade my HDB DB box?
Yes. We are EMA licensed and HDB approved, and we replace and upgrade HDB distribution boards in line with HDB guidelines for electrical works. We match the upgrade to your supply, since older flats often have a lower main-switch rating while newer or upgraded blocks have higher loading, and provide LEW certification where required.
How much does a new DB box cost?
As a guide, a single-phase 40A 18-pole MCB and DB box replacement starts from S$450, with earth bonding from S$50. The final price depends on your existing board, the number of circuits, and any extra work needed to meet current standards. We give you a clear, itemised quote before we begin.
Why does my DB box keep tripping?
Frequent tripping usually points to an overloaded circuit, a faulty appliance, earth leakage, or an ageing board that can no longer keep up. The breaker is doing its job by cutting the power. We diagnose the root cause rather than just resetting it, then repair or upgrade so the problem does not return.
Do you provide certification after the work?
Yes. Where a Licensed Electrical Worker (LEW) certificate is required, we provide it on completion, along with a clear explanation of the work we have done. Our electricians are EMA licensed and work to Singapore's electrical codes on every job.