Office Electrical Installation Singapore

The rules are specific, and knowing them takes the anxiety out of the question. Under EMA’s requirements, an electrical installation licence is required for three categories: installations used in hazardous trades; non-domestic installations with approved load exceeding 45kVA; and all supply installations for non-domestic purposes, regardless of load.

Installations used exclusively for domestic purposes are exempt. So an HDB flat or a condominium unit never needs one, but an office is non-domestic by definition, which is why this question belongs on this page and not on the residential ones.

Before you assume it applies to you, though, read the next section. For a large share of small office tenants, the answer is that somebody else’s licence already covers you.

EMA’s own footnote translates it: 45kVA is equivalent to 63A three-phase at 400 volts. That is a genuinely useful number because it lets you place your unit rather than guess.

Usually well below: a conventional office of workstations, lighting, a pantry and a couple of split air-conditioning units. What pushes a unit over: a server room of any substance, a commercial kitchen, workshop or production equipment, EV charging, or centralised air-conditioning plant serving the unit.

Charging points are the addition most often underestimated. The same load arithmetic applies to a single home or office wallbox charger, so size the supply before choosing the unit.

The threshold matters twice over, because it also governs which class of Licensed Electrical Worker can take charge. A Licensed Electrician covers approved load not exceeding 45kVA at 1,000V and below; a Licensed Electrical Technician covers not exceeding 150kVA for design and 500kVA for operation at the same voltage level; a Licensed Electrical Engineer has no load limit, subject to licence conditions. On a home this distinction is academic. On an office fit-out it is a real appointment decision, see commercial and industrial electrical work.

Google asks this, and we are going to answer it in a way that stays true after this page is a year old.

We are not going to print a standard number and an edition year. Standards get revised, web pages do not, and a confidently stated stale reference is worse than none, which is a lesson this site has already learned the expensive way on other pages.

What is stable and checkable: the electrical installation regulations Singapore relies on are the the Electricity (Electrical Installations) Regulations, published in full on Singapore Statutes Online, and they rank on this very search, which tells you Google considers them part of the answer.

What is practically useful: ask the Licensed Electrical Worker taking charge which edition of the Singapore Standard for electrical installations they are working to, and have it named in the specification. That gets you a current answer from the person legally responsible for it, which is worth more than a number copied off a contractor’s website.

Most commercial leases require the tenant to reinstate the unit at the end of the term, and almost no fit-out quotation mentions it.

Reinstatement can include removing the containment, the additional circuits and the sub-board you paid to install, so the fit-out you specify today has a removal cost attached to it that lands years later and is entirely predictable now.

Two practical consequences. Read the reinstatement clause before you design the fit-out, because a specification that is straightforward to remove is straightforward to reinstate. And keep the handover documentation, because knowing precisely what was added is what stops the reinstatement scope being negotiated from memory against a landlord with better records than you.

The electrical quote is rarely the biggest number in this decision. The downtime is.

Out-of-hours and weekend working costs more per hour and is frequently required by building management regardless. Phased handover, energising and testing circuits in stages so part of the floor keeps working, takes longer in total but avoids a full shutdown. A single shutdown is the fastest and the most disruptive.

The calculation worth doing before choosing: what an hour of your own downtime actually costs. For most offices it dwarfs the difference between the three approaches, and it usually argues for paying the out-of-hours premium rather than negotiating it away. If something fails unexpectedly mid-fit-out, an emergency electrician is the fallback.

Ask for these before the work starts. Asking afterwards is how you find out what was not included.

Test results: insulation resistance, earth continuity, loop impedance and RCCB operation as applicable to the installation. A board schedule with every way labelled to a circuit and a location. An as-built or updated single-line diagram where the distribution changed.

The name and licence number of the Licensed Electrical Worker responsible, which you can verify in about a minute, using the ELISE lookup guide. And the installation licence itself where one applies.

This is the paperwork that makes your next fit-out, your next fault and your eventual reinstatement a matter of reading rather than of excavation.

We make no claims about project scale, industrial credentials, client lists or maintenance contracts. This site is a live build and no operating contractor has been signed to it yet, so any such claim would be invented.

We do not publish a standards number or edition. See the code-of-practice section for why, and for the better question to ask.

Every price here is a published third-party figure with its source named, collected 18 August 2026, except the statutory fees, which are EMA’s. None of them is our rate. Landlord and MCST requirements are described generically because they vary by building, yours are whatever your building says they are.