Fuse keeps blowing on my hot water cylinder, how do I know what amperage fuse wire to use? Unsure what wattage the element is, has a sticker on the side of the actual cylinder that says "pre-wired 2000W". It's a Coppers 135 litre mains pressure cylinder. Any help would be appreciated before I blow something up.
sprinter51,
Jun 7, 7:56pm
Fuses are there to protect the cable
johotech,
Jun 7, 8:14pm
It's usually written on top of the fuse - as long as it hasn't been swapped around. 10A would be fine for a 2000W element - and you won't be "too high" with that size.
But the fuse blows for a reason. If it keeps blowing, or you don't get any hot water after 4-8hrs, then there's a problem.
Also turn off the main switch before removing & replacing the fuse. If the fuse wire hasn't been installed properly, there can be live bits of fuse wire outside the fuse holder.
skull,
Jun 8, 7:19am
I would suspect that the element is faulty if the correct fuse keeps blowing.
lythande1,
Jun 8, 8:05am
Most likely your element is stuffed or such. You don't just replace a fuse, it blows because there is a problem. People who ignore problems, end up with fires.
utu4,
Jun 8, 8:15am
Someone has put 5A fuse wire in the fuse, I'm presuming that could be why it keeps blowing?
tsjcf,
Jun 8, 8:48am
Yes 5 amp will keep blowing on a 2KW element
hulloitsme,
Jun 8, 4:03pm
2000 Watt element draws 8 -> 9 Amps
androth2,
Jun 8, 4:30pm
Buy a plug in replacement circuit breaker for the fuse holder
mojo49,
Jun 8, 5:23pm
A 2000 watt element would usually have a 15amp fuse to allow for a margin. Do not go higher than that. If 15 amp blows it is likely the element is shorting and needs replacing. If it is an older system the wiring to it will only be designed for a maximum 2000 watt element, not a newer 3000 watt element.
tweake,
Jun 8, 5:37pm
absolutely. don't waste you time with wire fuses.
johotech,
Jun 8, 5:51pm
They can be more dangerous, because there are so many different types of old fuses that the plug-in circuit breakers don't always make tight contact with the base.
Just replace the fuse wire with 10A wire and make sure that it is a tight fit.
easygoer,
Nov 1, 9:10pm
The important thing to look at with fuse wire is the manner in which it blows, if the wire has simply melted in the middle then you are looking at an overload situation, if it splatters copper over the inside of the fuse carrier, you have a short circuit which needs to be addressed before replacing the fuse, as above, the fuse covers the cable so cable size needs to be determined when increasing the fuse size
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