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 Help! Hood and built in oven switch

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DigitalMop
post Oct 15 2020, 11:26 PM

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Guys, sorry to necro this thread, i need help
My contractor share one 32c mcb with 1hp ac, kitchen lighting,kitchen plugs, fridge and washing machine. Will it overload? Will it post issue?
DigitalMop
post Oct 20 2020, 10:12 AM

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QUOTE(electron @ Oct 15 2020, 11:34 PM)
I notice kitchen plugs.
What do you plan to hook up to those plugs?
Kettle/rice cooker/juicer/toaster/food processor/microwave/etc?
And how many active at one time.
Usually the plugs for appliances would run a dedicated line.
Do you plan to use dryer with the washer?
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QUOTE(glasgowkitchen @ Oct 19 2020, 10:58 PM)
Overload….Depends on the type and number of kitchen equipment you are plugging into the kitchen plugs…

It’s better to have dedicated line for heavy duty appliances. But some older houses with single phase wiring… 1MCB covers the whole kitchen…

If it’s a 32A MCB, make sure your wire quality is good. I requested for a 4mm wire (4mm for live and neutral and 2.5mm earth). My electrician mentioned that if it is a good quality wire, 2.5mm is sufficient.

Let’s see… 32A… ‘For a margin of safety, it’s best if the normal load on a circuit does not exceed 80% of the maximum (rated) load.’ That leaves us with 25.6A.

Assuming its 240V…. W/V= A
Kitchen Lighting  80W          0.3A
Fridge    400- 800W 1.7- 3.3A
1hp AC    800W  3.3A
Washing Machine (no dryer)500W  2.1A
                      Total= 7.4- 9A
25.6A-9A= 16.6A left…

How many kitchen plugs do you have?
Kitchen Plugs (Wattage may vary, based on my kitchen appliances) 
Microwave    1000-1150W 4.8A
Mini Toaster Oven  800W  3.3A
Kettle    1850-2200W 9.2A
Portable Induction  2000W  8.3A
Stand Mixer    1500W  6.3A
Rice cooker    400W  1.7A
Slow cooker    250W  1.1A
Blender            900W  3.8A
32L Countertop Oven  1800W  7.5A

Just do the sum…. For total Amperage of the kitchen equipment
You can use
Blender, slow cooker, rice cooker and kettle simultaneously OR
Countertop oven and portable induction simultaneously….

Plus you won’t be using everything simultaneously…. Washing machine will only be on 1-2 hours a day, kettle 5mins each time… And your equipment setting might not be on max setting e.g countertop oven 250C max temperature max wattage.
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Thankx Guys for detailed feedback, Much appreciated !

So far I just clarified with the Electrician, he mention is not his fault, he did not touch the Kitchen or the AC MCB wiring, is the developer original setup. so he cant do much. he just advice me not to use all the heavy appliances all at once. He even say that newer condo uses a smaller DB box. Not sure what he said is true. Ill look for the condo management to confirm the case.

I guess like you said, not to use everything simultaneously, might be rare if i were to use all the appliances all at once.

Thankx again guys!

 

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