Electricity Load Calculator for Dubai and the UAE

Load is how much electricity a property draws when it is being used. It decides three things: the size of the incoming supply, the size of the main breaker, and the cable that feeds the board.

Get it wrong low and the main breaker trips whenever the household is busy. Get it wrong high and you have paid for capacity nobody uses.

It also matters when something changes. Adding an extra air conditioner, an electric oven or a car charger can push a property past what its supply was designed for.

That is when people find out, usually in August, that the main breaker was sized for a different life than the one they are living.

Add up every appliance in a villa at full power and you get an enormous number. Nobody installs a supply that size, and nothing goes wrong.

The reason is that appliances take turns. The oven is on for an hour a day. The kettle runs for three minutes. The water heaters cycle on and off. The air conditioners run, but not all four at full power at the same second.

Diversity is the allowance for that. For a home it is usually somewhere between about half and two thirds of the connected total.

That is why the tool asks. Set it to 100 per cent and you get the theoretical maximum, which is a useful upper bound and a very expensive thing to design to.

The one place to be careful is a UAE summer afternoon, when the air conditioning genuinely is all running at once. That is why the villa figure here is higher than it would be in a cool climate.

In order of what they contribute to the total.

A motor draws far more current for the first moment than it does while running.

An air conditioner compressor starting can pull several times its running current for a second or two. So can a water pump, and so can a large fridge.

This does not show up in a load calculation, because it lasts too briefly to add to the total. It shows up as a breaker tripping when three things start at once.

Inverter air conditioners are much gentler about this, because they ramp up rather than slamming on. That is another reason they suit a home with a lot of units.

If a property trips at a specific moment, usually when the AC kicks in, starting current is the first place to look rather than the total load.

If this tool gives you a figure larger than your main breaker, that does not mean the installation is wrong. It means it is being asked to do more than it was designed for.

The cheapest answer is often to spread the load rather than increase the supply. Not running the oven and both water heaters at the same time costs nothing.

Timers help. Water heaters on a timer that avoids the busiest hour take a real chunk out of the peak.

Beyond that, increasing a supply is a job that involves the utility, not just an electrician. It means new cable, a new main breaker and often a new meter arrangement.

Either way, this is the point to get a qualified electrician to look at it. Bring the number from this tool with you and the conversation will be much shorter.