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Posted by Emimec on May 4, 2008, 4:44 pm
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> Peter Fairbrother wrote:
>> Emimec wrote:
>>> Sorry to be so off topic, but a Google revealed nothing. I need to know
>>> the approximate cost per unit of 3 phase electricity. My landlord is
>>> rumbling a lot about my consumption, keeps telling me I use about 160
>>> units a day?
>>
>> That would be 6.6 kW continuous 24/7/365 ..
>>
>>
>>> Having only had 2 electricity bills in 10 years from him, were not
>>> dealing with Einstein, but if I could get an estimated cost of a unit,
>>> I'm prepared in case his one brain cell kicks in one day !!!
>>
>>
>> Prices vary quite a lot, but 10p per unit is about right after the first
>> 1,000 or so units - so 160 units per day is £5,840 per annum. Not
>> surprised he's complaining ...
>>
>> -- Peter Fairbrother
>
> Oh btw, the charges are about the same for domestic single phase and three
> phase - but industrial use has VAT at 17.5% added, while domestic use VAT
> is 5%.
>
> The standing charge maybe be more for 3-phase too. Depends on the
> supplier. If an industrial user uses a lot they may get a discount too -
> so it's not easy to be accurate.
>
> -- Peter Fairbrother
Many thanks all.
Sounds like it could be why the landlord says he's paying me to be there !!!
The only 2 bills I ever had were scribbled on page from a page from a copy
type of book, just an amount, no details. He has trouble reading the meter,
doesn't really understand it, or didn't, sounds like some bright spark (no
pun intended) has educated him.
I want to install my own meter, when I can understand the stuff on eBay, so
I can keep my own tally on the situation. Need a new MEM type 3 phase
distribution MCB box to replace the old fashioned fuse type, 8 way or more,
so again, any advice welcome, bearing in mind eBay is my preferred supplier.
Thanks all.
Bob
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Posted by mark@ems-fife.co.uk on May 4, 2008, 6:39 pm
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> pun intended) has educated him.
> I want to install my own meter, when I can understand the stuff on eBay, so
> I can keep my own tally on the situation. Need a new MEM type 3 phase
> distribution MCB box to replace the old fashioned fuse type, 8 way or more,
> so again, any advice welcome, bearing in mind eBay is my preferred supplier.
> Thanks all.
> Bob
Bob,you don`t give enough info to guess at your elec costs so I`ll
give it a miss.I will tell you however to be very careful of MEM mcb
boards.There are loads of them on Ebay that use obsolete or very
expensive breakers.I have a few very nice MEM boards that I can`t
install because breakers are not available.Merlin Gerin are the best
ones.Unless you have to upgrade to breakers from fuses I would stick
with fuses,allows far more flexibility.
Mark.
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Posted by Emimec on May 5, 2008, 2:50 am
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>
>> pun intended) has educated him.
>> I want to install my own meter, when I can understand the stuff on eBay,
>> so
>> I can keep my own tally on the situation. Need a new MEM type 3 phase
>> distribution MCB box to replace the old fashioned fuse type, 8 way or
>> more,
>> so again, any advice welcome, bearing in mind eBay is my preferred
>> supplier.
>> Thanks all.
>> Bob
>
> Bob,you don`t give enough info to guess at your elec costs so I`ll
> give it a miss.I will tell you however to be very careful of MEM mcb
> boards.There are loads of them on Ebay that use obsolete or very
> expensive breakers.I have a few very nice MEM boards that I can`t
> install because breakers are not available.Merlin Gerin are the best
> ones.Unless you have to upgrade to breakers from fuses I would stick
> with fuses,allows far more flexibility.
>
> Mark.
Many thanks Mark. Youre right, not enough info, as I dont have it, and I
dont know enough about the subject.
Bob
>
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Posted by Peter Fairbrother on May 5, 2008, 12:22 pm
Please log in for more thread options Emimec wrote:
>> Peter Fairbrother wrote:
>>> Emimec wrote:
>>>> Sorry to be so off topic, but a Google revealed nothing. I need to know
>>>> the approximate cost per unit of 3 phase electricity. My landlord is
>>>> rumbling a lot about my consumption, keeps telling me I use about 160
>>>> units a day?
>>> That would be 6.6 kW continuous 24/7/365 ..
>>>
>>>
>>>> Having only had 2 electricity bills in 10 years from him, were not
>>>> dealing with Einstein, but if I could get an estimated cost of a unit,
>>>> I'm prepared in case his one brain cell kicks in one day !!!
>>>
>>> Prices vary quite a lot, but 10p per unit is about right after the first
>>> 1,000 or so units - so 160 units per day is £5,840 per annum. Not
>>> surprised he's complaining ...
>>>
>>> -- Peter Fairbrother
>> Oh btw, the charges are about the same for domestic single phase and three
>> phase - but industrial use has VAT at 17.5% added, while domestic use VAT
>> is 5%.
>>
>> The standing charge maybe be more for 3-phase too. Depends on the
>> supplier. If an industrial user uses a lot they may get a discount too -
>> so it's not easy to be accurate.
>>
>> -- Peter Fairbrother
>
> Many thanks all.
> Sounds like it could be why the landlord says he's paying me to be there !!!
Are you sure you use 160 units per day? That's a lot - enough to run say
12 or more 2HP Bridgeports or medium size lathes fairly hard for 14
hours per day.
I don't know how big your workshop is though, and if you have any
electric heating like a kiln that can use a lot.
(a 2HP Bridgeport will use less than 1 kW on average, unless run really
hard)
Contact me offlist if you want an estimate based on machines, usage etc.
My email address is real.
> The only 2 bills I ever had were scribbled on page from a page from a copy
> type of book, just an amount, no details. He has trouble reading the meter,
> doesn't really understand it, or didn't, sounds like some bright spark (no
> pun intended) has educated him.
> I want to install my own meter, when I can understand the stuff on eBay, so
> I can keep my own tally on the situation.
That's easy enough, a 3-phase meter costs about a tenner plus a tenner
postage on ebay. You'll need tails too.
However the only way you will get to know how much the units actually
cost is to get a look at the landlord's bill.
Need a new MEM type 3 phase
> distribution MCB box to replace the old fashioned fuse type, 8 way or more,
> so again, any advice welcome, bearing in mind eBay is my preferred supplier.
Mark has commented on MEM boards and MCBs, and I can't add anything
useful - except if you want to change a board it would probably be good
to get a sparky, or better someone who knows sparky-ing, to help - I'm
unfamiliar with the regs in detail, but a registered sparky might be
required to do some paperwork.
There are a few boards complete with main switch and MCBs available on
ebay, not MEM brand - search for "3 phase board" - eg the 8-way 3 phase
TP&N:
http://cgi.ebay.co.uk/8-Way-3-Phase-Distribution-Board-Unit-c-w-125a-MS-MCBs_W0QQitemZ250243423635QQihZ015QQcategoryZ41499QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
- also available at £95 buy-it-now
- I haven't used them, but they look okay, and you can have any
combination of MCBs.
Personally I prefer MCBs to fuses for 3-phase - if fuses are used if
only one phase blows then you can still have two live phases. However
some MCB/motor combinations can trip unexpectedly on startup etc - you
will need type C breakers for the motor circuits.
-- Peter Fairbrother
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