calling all apprentice sparkys 2nd year and over

[trentvy]

if a 3.6kw load is connected to a 230v supply what will the current be flowing at a power factor of 0.8.

I thought I could of just gone P/V=I but if they give me the powerfactor what do I do with that?

[garth]

now dont kill me if im wrong, been a few years since ive been at tafe


if my memory serves me right, the formular is input watts devided by va.

you know the input watts, you know the volts so you gotta transpose it to find the current.

so it should be something like this

a= kw x pf devided by voltage = a
so in my case, it's 3600x.8 = 4500
4500/230 = 19.56

then you put thoss numbers back into the formula, above it should be like this

pf = 3600/ (va)
so 3600/ (230x19.56)= pf which is .80021

[Bobski]

AC with power factor.
Yeah transpose the equation to I=(W x PF)/V

Jeeze. Didn't do that all that long ago.. took me a while to think of it..

[soop]

Totally pointless post. But f**K being a sparky.
I'm flat out counting to 10...

[trentvy]

lol its a head**** alright.. thanks for your help mate

[Bobski]

Totally pointless post. But f**K being a sparky.
I'm flat out counting to 10...

haha I thought that at the start of my first year. Isn't too bad now considering I'm earning more than a bloke i know, he's a fully qualified mechanic.. I just turned 3rd year

[Niggadore]

Ahh, you learn these formulas in the pre apprenticeship, before you even start..

[cewing]

haha I thought that at the start of my first year. Isn't too bad now considering I'm earning more than a bloke i know, he's a fully qualified mechanic.. I just turned 3rd year

You must be on some sort of EBA agreement ay
At my work we have 4th yr sparkies who make more than the permanent elec tradies

[Bobski]

Yeah cause I passed all my exams and shit I get an award bonus and everything. Only shit thing is the recession.. work is sluggish as. Waiting till after Chrissy when it looks like it will pick up again so I can finally attend to the car.