Here you go - linkHow variable are 13A fuses in their performance wrt to surge? I guess that there may be some spec for this? Do cheap far eastern fuses behave any different to quality ones?
Thanks for that. That link suggests that a 13A plug will stand a surge current of 100A for 1/10 second, which seems to tie in with people reporting that they've been using 2-posts with no problem. Might be good idea to make sure you're using a good quality plug, and that it is fitted well.Here you go - link
It will stand it, but that doesn't mean it is sensible to intentionally use it that way.Thanks for that. That link suggests that a 13A plug will stand a surge current of 100A for 1/10 second, which seems to tie in with people reporting that they've been using 2-posts with no problem. Might be good idea to make sure you're using a good quality plug, and that it is fitted well.
you could say the same everyone running there 16 amp migs on a 13 amp plug the lift is intermittent running just for about half a minuteIt will stand it, but that doesn't mean it is sensible to intentionally use it that way.
you could say the same everyone running there 16 amp migs on a 13 amp plug the lift is intermittent running just for about half a minute
it is safe. the fuse is under rated not over my mates 3 phase lift runs on a converter plugged in to a 13 amp socketI do say the same about that. Its not sensible in the long term, just because it works it doesn't mean it is necessarily safe.
Let's restrict the conversation to this particular instance. British Standards could have designed a 13A fuse that was much less tolerant of start up currents, but they chose to design one that seems very tolerant. Let's say the fuse blows once or twice a year. That would not strike me as a misuse.just because it works it doesn't mean it is necessarily safe.
Or has bought his car in for a service.Needs must when the devil drives...
And why would it be unsafe? You should wire a seperate earth maybe, but beyond that why unsafe?I do say the same about that. Its not sensible in the long term, just because it works it doesn't mean it is necessarily safe.
Let's restrict the conversation to this particular instance. British Standards could have designed a 13A fuse that was much less tolerant of start up currents, but they chose to design one that seems very tolerant. Let's say the fuse blows once or twice a year. That would not strike me as a misuse.
I am not a qualified electrician, and I can see that some may say it is not "best practice" but I cannot see a failure mode which gives rise to a safety problem. Am I wrong ?
And why would it be unsafe? You should wire a seperate earth maybe, but beyond that why unsafe?
like emersion heaters tumble driers and electric fires all 3 kw and plugged in under constant use . a 2.5kw motor running intermittently isnt going to do thatWhy on earth would you need a seperate earth?
I say unsafe because that is my opinion based on my experience of having seen a fair amount of 13A plugs or fused connection units melted or burned as a result of small overloads causing damage over a longer period of time.
My point exactly but nobody seems to have read my post regarding the regs. a 13amp spur of the ring main is the maximum allowed at any one point wired in 2.5mm cable
With big steel structure connected to mains via a 13a plug you are rellying on the earth pin an cable, connections etc to protect you in the event of a fault. At least if you have a seperate earth you will allways be safe, relatively. Who knows, an angle grinder cable pinched between two bits of steel, the lift plug not even in, and the whole job could be live?Why on earth would you need a seperate earth?
I say unsafe because that is my opinion based on my experience of having seen a fair amount of 13A plugs or fused connection units melted or burned as a result of small overloads causing damage over a longer period of time.