Large banks of Flourescant lighting.yeah i know that type c has a great ability to hold in when a surge occursbut what determins typically when you would install c over b?
Don. I'm interested. What sort of workshop machinary? Is it items which require a very large starting current such as table saws/spindle moulders?Large banks of Flourescant lighting.Certain types of Workshop machinery for example.
Don
anything motor wise or fluoresent lighting has high start currents so the type b might not hold,Don. I'm interested. What sort of workshop machinary? Is it items which require a very large starting current such as table saws/spindle moulders?
This would depend on the actual start up current, specified by the manufacturers of the machinery.Don. I'm interested. What sort of workshop machinary? Is it items which require a very large starting current such as table saws/spindle moulders?
Inductive yes, resistive no.anything motor wise or fluoresent lighting has high start currents so the type b might not hold,its all to do with inductive or resistive loads
my basic understanding 1800/240 = 7.5amps!This would depend on the actual start up current, specified by the manufacturers of the machinery.I have seen an instance of a 16A type B mcb, unable to supply (without tripping) a 1.8KW circular saw, for example.
Don
Is that when you are removing those horses heads for the boys to dispatch? :|This would depend on the actual start up current, specified by the manufacturers of the machinery.I have seen an instance of a 16A type B mcb, unable to supply (without tripping) a 1.8KW circular saw, for example.
Don
1 to be remembered ! especially if it comes back not faulty !my basic understanding 1800/240 = 7.5amps!Must have a hell of a draw @ start up
I sent a mitre saw back as faulty as it kept tripping my MCB on a 13A supply
:|
I believe my boys, use whatever is available to hand, but the DonIs that when you are removing those horses heads for the boys to dispatch? :|
as a general rule C is motor rated, inductive loadyeah i know that type c has a great ability to hold in when a surge occursbut what determins typically when you would install c over b?
Indeed so, consideration for the cable size, also comes into effect when using type C or D MCBs...as a general rule C is motor rated, inductive loadand D is transformer rated, resistive load.
B is just a general use run of the mill middle of the road.
remember tho, if you go from a B to C you will half your permitted Zs, and from a C to D you will half it again.
Zs B = 46/MCBrating
Zs C = 23/MCBrating
Zs D = 11.5/MCBrating
I think. Pray
Once again Mr Steps.. another Important Gem' added to the topic! ; )Applaud Smileyas a general rule C is motor rated, inductive loadand D is transformer rated, resistive load.
B is just a general use run of the mill middle of the road.
remember tho, if you go from a B to C you will half your permitted Zs, and from a C to D you will half it again.
Zs B = 46/MCBrating
Zs C = 23/MCBrating
Zs D = 11.5/MCBrating
I think. Pray
its a simplistic way of describing it, and how exactly would you describe the load from a transformer then?a transformer is resistive! i think not!
it is inductive.its a simplistic way of describing it, and how exactly would you describe the load from a transformer then?
so we measure across a transformer with an AC voltage (NOT DC ala your meter!) why do we get a resistance? and that is why we need to use a different characteristic MCB to avoid tripping on this load?it is inductive.a filament light bulb or load that has no coil is resistive only
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