Discuss X3 isolator switches blown for zip inline water heater in the The Welcome Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

Reaction score
13
Hi,

Got sent to a job today at student halls of residence. They have had 3 45 amp isolator switches blow in the last month for the zip inline water heater.
As shown in pictures, the water heater is being fed by a B40MCB and then in to a 45 amp isolation point above the door, then to the heater with 10mm.
The students keep the isolator switch on all the time, and have the setting on the heater at 55, the highest setting.
Would the fact that it’s bwing left on 24/7 through the isolator be the issue? Or is it just dodgy switches? The cable all looks fine and tests out ok. Just changed the switches and was fine. Just want to know if it being left on all the time would do this??

X3 isolator switches blown for zip inline water heater B54BF9A7-3029-49D9-B459-71A04586BCC4 - EletriciansForums.net


X3 isolator switches blown for zip inline water heater 8927DC0E-D6DC-417F-84C5-289A8BA17D29 - EletriciansForums.net


X3 isolator switches blown for zip inline water heater A017CC63-E330-455F-B55D-A124ADF7661E - EletriciansForums.net
 
The students were probably playing with the switch.... Holding it at the half on- half off position listening for the crackle.

Looking online for those heaters, I think its the Zip Dex12 retailing at over £400.
Data specs show power rating at 11kW That could be the problem. Check the rating of the heater you have there.
I first found the Zip Dex…. which was rated at 27kW! Couldn't be that one
 
The switch is no longer functional. Need to have another look to find out if it is a DEX12 or DEX?

DEX12 rated current: 38/48
DEX: 26/39

Think it is possible that they have been playing around with the switches.
 
I take it you mean the actual switch mechinisum and not the cable at the termination screws.
 

Reply to X3 isolator switches blown for zip inline water heater in the The Welcome Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock