new CU or retrofit RCBOs for new water heater circuit?

[bertle]

Thanks Loy. sorry to bother you again, but you've been really helpful.

Re mains supply fuse.

Have a Connecting Block RDL CB3, believe to be rated to 100A after googling this model. Have a RDL CB6 Henley block, 100A stamped on it, I think this splits the supply somehow as one set of tails goes into the Economy 7 teleswitch. Meter tails 9.8mm diameter, measured at coloured red inner sheath insulation with vernier calipers. EDF meter installed in 2003. Says its rated between 20 - 100A. CU split into two rows of MCBs, each row has a 100A circuit breaker a the end of it.

Can I safely guess that I have 100A supply? Have been onto power company about service fuse, but calling after work they are too busy, and when I call at work Im on hold for too long.

Is there any sure fire way to determine supply, bar getting DNO to check service fuse, or trying to draw 80A from my appliances, and then 100A to see if I can pop the service fuse?

Thanks

bertle.

 

[mrloy99]

Thanks Loy. sorry to bother you again, but you've been really helpful.

Re mains supply fuse.

Have a Connecting Block RDL CB3, believe to be rated to 100A after googling this model. Have a RDL CB6 Henley block, 100A stamped on it, I think this splits the supply somehow as one set of tails goes into the Economy 7 teleswitch. Meter tails 9.8mm diameter, measured at coloured red inner sheath insulation with vernier calipers. EDF meter installed in 2003. Says its rated between 20 - 100A. CU split into two rows of MCBs, each row has a 100A circuit breaker a the end of it.

Can I safely guess that I have 100A supply? Have been onto power company about service fuse, but calling after work they are too busy, and when I call at work Im on hold for too long.

Is there any sure fire way to determine supply, bar getting DNO to check service fuse, or trying to draw 80A from my appliances, and then 100A to see if I can pop the service fuse?

Thanks

bertle.

Yes bertle,you are quite right the only way of confirming that you have a 100amp service fuse is to cut the seal and withdraw the fuse.It wasn't me,it was like that! It wouldn't be the first one I've come accross.
Also from what I can make out from your previous corespondence you said you have convector heaters,and NOT storage heating.If this is indeed the case then the only circuit supplied is your water heater?? So when you take this out your E7 will be completly redundant. So you should contact your supplier and get onto normal tarrif.The way E7 works is that they charge you more on your day rate and less on your night tarrif. The normal tarrif is less.