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Maximum Demand / ENA / EV Help!

D4G
Hello all,


This evenings issue relates to an EV charger install.

The supply cut out is labelled 60/80 amp so I called the DNO and asked if this could be uprated to 100 amp.

They have sent me the ENA EV application form which asks for the Maximum Demand including the new equipment.

The problem I have is the existing circuits are:


32A - 7.2 kW shower 

40A - 8.2 kW shower

32A - Ring main

32A - 7.9 kw cooker

6A - lighting

6A - lighting

6A - security


Additional 32A for EV charger


So even with diversity I'm way over 100A, obviously in reality the diversity calculations are not appropriate as the client has never blown the cut out.

The smaller shower is not currently in use although they want to replace it for another one, I have told them this may not be possible.

The EV charger will have load management but I still need to put a figure on the ENA form....


Help appriciated :)
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  • Former Community Member
    0 Former Community Member
    the govt will need to be tapped up for a street main renewal scheme to rival that of the removal of cast iron from the underground  gas network.


    As far as I can tell the DNOs are largely sitting back waiting for this to happen, just getting ready to say "look we tried, but now you need to pay us to fix it". They know that ultimately the government will have no choice but to pay for serious LV network reinforcement. Expensive mitigations using their own money now are just not good business sense, even if that avoids digging everything up in a few years time. New housing estates are still being built with load assumptions that are looking ever more dubious as time goes on.


    Am I being too cynical here?


    WPD offering new supplies as 3 phase by default is a good start, but so far as I am aware they are the only ones?


Reply
  • Former Community Member
    0 Former Community Member
    the govt will need to be tapped up for a street main renewal scheme to rival that of the removal of cast iron from the underground  gas network.


    As far as I can tell the DNOs are largely sitting back waiting for this to happen, just getting ready to say "look we tried, but now you need to pay us to fix it". They know that ultimately the government will have no choice but to pay for serious LV network reinforcement. Expensive mitigations using their own money now are just not good business sense, even if that avoids digging everything up in a few years time. New housing estates are still being built with load assumptions that are looking ever more dubious as time goes on.


    Am I being too cynical here?


    WPD offering new supplies as 3 phase by default is a good start, but so far as I am aware they are the only ones?


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