# Increasing power supply to building

1. May 13, 2012

### CognitiveNet

I have a warehouse (industrial building) which has a 5killowatt/hour output. This is a 3 phase supply.
I need to increase it to at least 10killowatt/hour. The electrical system is modern. But do I need to change the infrastructure to increase the power output?

If I need to change the infrastructure, does it mean the electricity supplier also needs to setup more power poles (the wooden poles the lines are attached to)?

Can you assume how much it would cost to achieve this increase in poweroutput?
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What will it be used for? I'm installing a couple tankless waterheater. Each one of them seem to have a power consumption of 4killowatt/hour. Is this normal?

2. May 13, 2012

### Staff: Mentor

First of all, it's just kilowatts (kW). There is no such thing as kilowatts per hour.

Second, 5 kW is pretty low. My house, for example, has a capacity of 24 kW. So I'd be surprised if your building can't handle it. The main electrical panel should tell you the size of the main circuit breaker and probably the voltage. Either way, you're going to need to hire an electrician to wire the heaters, so they'll be able to tell you what you need to make it work.

3. May 13, 2012

### CognitiveNet

In that case, why does the electricity "shut off" when I've got too many things on in the kitchen? I suppose the grid is divided into different parts? But for an industrial building, I suppose the grid would mostly be concentrated to one room?

4. May 13, 2012

### Staff: Mentor

Your warehouse has a kitchen? Maybe you are powering multiple power-hungry appliances from a single power outlet and using double adapters or power boards to do this?

How many amps are the circuit breakers rated on your 3 phase?

5. May 13, 2012

### CognitiveNet

I don't know the amps rating. But I need to connect at least two, tankless water heaters which run on at least 4kWh. (I'm using an industrial warehouse/showroom as a studio). I'm not sure if such a building which consists of a single room would have any powergrid close to i.e. 24kW.

The rest of the building is just a pair of offices, one on 1st and other on 2nd floor. It has water connected to it.

6. May 13, 2012

### CognitiveNet

Can you assume that this typical warehouse (100m^2) would have a capacity of 24kw?
Do I need to be more specific?

Last edited: May 13, 2012
7. May 13, 2012

### CognitiveNet

I replied you... see above.

8. May 13, 2012

### jim hardy

Tankless water heaters are HUGE power eaters.

24 kw is 100 amps at 240 volts. And that's about what you'd need for a 4 gpm hot shower.

You need wire about the size of your thumb to deliver 100 amps.
I will be surprised if you find an outlet that large.

The landlord could get one put in for you surely
but an old fashioned tank heater may be more practical.
If you build a box around it and insulate it well it'll be as efficient as a tankless, by any reasonable measure.

that's my thoughts.

9. May 14, 2012

### Staff: Mentor

I think you should be able to take a good photo of the switchboard/meterboard and post a link to it. The printing needs to be readable.

10. May 14, 2012

### Staff: Mentor

You can't assume anything. You need to hire an electrician.

11. May 15, 2012

### CognitiveNet

But could you please tell me what the most common powergrid is for a typical small warehouse/showroom at 100m^2 or higher? You'd be doing me a great favor.

12. May 15, 2012

### Staff: Mentor

Sorry, guesswork is not acceptable in matters of life and death. If you won't listen to us, we won't help you kill yourself. Thread locked.