Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 9 replies
  • Subscribers 32 subscribers
  • Views 1415 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Bad Advice? Water Heater.

Zoomup

"Due to their point-of-use installation these units also benefit from minimal standing heat loss, and when added to the fact that, because this heater is only 3kW, unlike instantaneous water heaters, it can be spurred off a ring main rather than requiring its own dedicated circuit and then it becomes clear why the Redring WS7 Water Heater has quickly become a firm favourite."



Outlet Spout: 300mm


Is this really sensible advice. Years ago we put 3kW immersion heaters on a dedicated radial circuit. Is this advice a backwards step?


Z.


Parents
  • 0
    Oven, water heater and tumble dryer maybe more of a problem. The 2 minute flash to 40 amps on a 32A breaker to make a cup of tea will not trip anything or overheat the wiring .

    Not sure why your oven is on the ring for that matter..

    Realise that the original ring designers also assumed you'd be lugging electric fires from room to room, instead of setting up the fireplace, now with central heating you probably do not. 

    Also being only 7 litres the re-heat time with a 3kw element will not be much more than quarter of an hour or so anyway, so not like a 200 litre tank all night.

    (to raise one litre of water 1 degrees is 4.2 kw seconds, or 1.5 seconds per degree.litre at 3kW , and I presume you do not want it boiled more like a 40- 50 degree rise,  so 50deg *1.5* 7litre = 525seconds, ~10mins  )

    It is probably OK, but it rather goes against the current trend for fitting  lots of radials one per major load.

    Mike

Reply
  • 0
    Oven, water heater and tumble dryer maybe more of a problem. The 2 minute flash to 40 amps on a 32A breaker to make a cup of tea will not trip anything or overheat the wiring .

    Not sure why your oven is on the ring for that matter..

    Realise that the original ring designers also assumed you'd be lugging electric fires from room to room, instead of setting up the fireplace, now with central heating you probably do not. 

    Also being only 7 litres the re-heat time with a 3kw element will not be much more than quarter of an hour or so anyway, so not like a 200 litre tank all night.

    (to raise one litre of water 1 degrees is 4.2 kw seconds, or 1.5 seconds per degree.litre at 3kW , and I presume you do not want it boiled more like a 40- 50 degree rise,  so 50deg *1.5* 7litre = 525seconds, ~10mins  )

    It is probably OK, but it rather goes against the current trend for fitting  lots of radials one per major load.

    Mike

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines