# Why is the fuse blowing?

## Main Question or Discussion Point

I have a circuit in my house that sometimes blows its fuse. Now, electricity is not my field at all so I'm asking you guys. I know the fuse is 10 amps, I use perhaps 3,5 kW on this circuit, and we have 230 V over here. Don't know if that's enough info to make any form of judgement on whether or not I'm using to much stuff on this circuit, but I don't know what else to tell you...

Related Electrical Engineering News on Phys.org
Q_Goest
Homework Helper
Gold Member
Just a thought, is the load an electric motor? Motors have a very high inrush that can trip a breaker, even though the nominal current is well below the breaker rating. (Inrush is the current when the motor is started and before it gets up to speed.)

russ_watters
Mentor
??? What am I missing here? 3500/230=15Amps

WFO
As Russ pointed out, 230volts X 10 amps = 2300watts, well below both of your predicted loads.
Simply put, you have too much plugged in.

Ah, now I get the equation at least. Obviously I must have overestimated the load. Thx guys :)

10A sounds low for a 230V ring main. I would expect 15A or 30A
What have you got connected to the fuse, Lights or Wall sockets? this is important as it will affect how you track down the fault.
Do you know how many rings are in your house and how they are nominally connected?
Also what country are you in? as whilst I can track down faults I am much better with UK type wiring regs than US type ones, and what the Greeks do frightens me.