3 Phase Distribution Board Dilema

SparkingMad1997 · Nov 30, 2023

westward10 said:
Why the two boards are they metered?

Whilst maximum demand of the 100 amp main switch is just tetering on exceeding the rated current (and I don't think I can get anything larger than 125A for Proteus) I also need a HVAC board and contactor linked into the fire detection to kill the hvac board in the event of alarm activation.

Flanders · Nov 30, 2023

Eaton MEM EBMSL14102MPMB 14+10way 200amp TPN Split Metered Power and Lighting Board would this board work for you

SparkingMad1997 · Nov 30, 2023

There has been some great feedback here guys and all sooooo helpful! All my boss wants to do is quickly me along and cheap cheap cheap! With absolutely no understanding where he's been off the tools for so many years!

So ive taken all of your knowledge and suggestions and think ive decided on an engineering judgment on how I'm going to move forward on this project!
1 - 434.2 is gold here because well... I really don't want to work with cable bigger than I really have to!
2 - MCCB Incomers - Ive never had to consider before and this allows me to comply with the above whilst protecting my DB main switches
3 - I can be cost effective in that two separate MCCB enclosures is apparently cheaper than the Ryefield (which is about a grand according to the boss)
4 - I can be time effective in that making all the links for a Ryefield is time consuming. (im sure you can probably buy somthing prefabricated)
5 - I will use a 100amp MCCB Incomer for the HVAC DB, a 125 Amp for the Main DB

You have all been absolute stars and a great response for my first posting here! Ill have to grab pictures of the final product!
Play safe out there!

ipf · Nov 30, 2023

Photo of existing and sketch plan of required would be useful.
Like to see this busbar chamber.

Rockingit · Nov 30, 2023

SparkingMad1997 said:
There has been some great feedback here guys and all sooooo helpful! All my boss wants to do is quickly me along and cheap cheap cheap! With absolutely no understanding where he's been off the tools for so many years!

So ive taken all of your knowledge and suggestions and think ive decided on an engineering judgment on how I'm going to move forward on this project!
1 - 434.2 is gold here because well... I really don't want to work with cable bigger than I really have to!
2 - MCCB Incomers - Ive never had to consider before and this allows me to comply with the above whilst protecting my DB main switches
3 - I can be cost effective in that two separate MCCB enclosures is apparently cheaper than the Ryefield (which is about a grand according to the boss)
4 - I can be time effective in that making all the links for a Ryefield is time consuming. (im sure you can probably buy somthing prefabricated)
5 - I will use a 100amp MCCB Incomer for the HVAC DB, a 125 Amp for the Main DB

You have all been absolute stars and a great response for my first posting here! Ill have to grab pictures of the final product!
Play safe out there!

One of the things that I have always loved about this forum (above many others) is the breadth of experience and knowledge and the willingness to share that, especially when trying to solve a genuine problem. You’re welcome!!

SparkingMad1997 · Nov 30, 2023

ipf said:
Photo of existing and sketch plan of required would be useful.
Like to see this busbar chamber.

Unfortunately im having issues uploading these pictures from the phone where the file is too large... Id love to show you!

nicebutdim · Nov 30, 2023

SparkingMad1997 said:
Unfortunately im having issues uploading these pictures from the phone where the file is too large... Id love to show you!

Even cropping the edges can be enough to reduce them to the required size.

SparkingMad1997 · Nov 30, 2023

Here we go! I tried changing the quality at first which didn't work!

davesparks · Nov 30, 2023

pc1966 said:
As there is a 200A fused-switch feeding it then easy to do,

Easy enough to do yes, but that does mean shutting down the whole installation which may be more problematic.

pc1966 said:
and if 100A fuses feeding the TPN boards they should be no more likely to be blown than typical house DNO fuses, and will have total selectivity with the 200A ones.

My comments were based on not knowing if this was 2 DBs adjacent to the incomer or 2 remote DBs fed by distribution circuits.

Plus Proteus do have a reputation for making less than reliable DBs.

SparkingMad1997 · Dec 1, 2023

Here's some kind of sketch to give you guys an idea. Not exactly to scale

SparkingMad1997 · Jan 3, 2024

Happy new year all!

Furthering my dilemma... This site is due to open to the public in a couple days time and I'm told that an energy meter will not be installed for a matter of weeks. Now as the meter will most likely be CT arrangement there is nothing physically stopping me going to the main intake and switching my install on. Where does this leave me legally though? The theft act of 1968 section 13 says that dishonesty is the key factor in proving the offence. Soooo if there is no meter then we cant honestly monitor the amount of energy used and therefore cant be charged accordingly.

IDK guys
What's your thoughts?

James · Jan 4, 2024

Quite Simpley
No,No, NO.
you are not authorised to connect anything to the service head.

if the energy supplier won’t budge and can’t provide a supply before you are due to open then the only realistic option is to hire a temporary generator.

Rockingit · Jan 4, 2024

I'm confused. You started the thread talking about what was made to sound like a commercial install, then it changed to include a landlord and now the narrative is one of gates and public. What, exactly, is the nature of this installation?? And no, you can't just energise without a meter as it's not your energy.

nicebutdim · Jan 4, 2024

James said:
Quite Simpley
No,No, NO.
you are not authorised to connect anything to the service head.

if the energy supplier won’t budge and can’t provide a supply before you are due to open then the only realistic option is to hire a temporary generator.

I'd imagine the penalty for dishonestly drawing 200A from a 3ph supply would be significantly greater than for stealing electricity in a domestic setting. I'd also imagine the chances of being caught are also significantly higher.

pc1966 · Jan 4, 2024

nicebutdim said:
I'd imagine the penalty for dishonestly drawing 200A from a 3ph supply would be significantly greater than for stealing electricity in a domestic setting. I'd also imagine the chances of being caught are also significantly higher.

In the OP's case they are suggesting their own meter, presumably MID-compliant, until the official meter is installed so it might fail the test of dishonesty for any prosecution as they would be measuring and intending to pay for the usage.

I suspect it would still cause so much legal headache it is absolutely not worth doing!

3 Phase Distribution Board Dilema

SparkingMad1997

Flanders

-

SparkingMad1997

ipf

-

Rockingit

-

SparkingMad1997

nicebutdim

SparkingMad1997

Attachments

davesparks

SparkingMad1997

Attachments

SparkingMad1997

James

-

Rockingit

-

nicebutdim

pc1966

News and Offers from Sponsors

Similar threads

OFFICIAL SPONSORS

YOUR Unread Posts