Garage workshop testing

[gdrms]

Apologies for including this question in my previous thread! I have recently undertaken a job at a garage workshop and found the Snap On chargers have a 10A fuse at the plug when the charger draws just a few watts. I changed the fuses so far but with so many of them having the same 10A fuse I'm beginning ti think maybe there's a reason for it. Any thoughts on this anyone?

 

[J@mes]

do they have any kind of boost charge or assisted starting features?

 

[IQ Electrical]

Apologies for including this question in my previous thread! I have recently undertaken a job at a garage workshop and found the Snap On chargers have a 10A fuse at the plug when the charger draws just a few watts. I changed the fuses so far but with so many of them having the same 10A fuse I'm beginning ti think maybe there's a reason for it. Any thoughts on this anyone?

What size flex is on these chargers?

Just wondering what prompted you to change the fuse?

 

[Adam W]

Answered in previous thread.

 

[IQ Electrical]

Answered in previous thread.

Yes but does the OP know that the flex CSA is the limiting factor for fuse size?

 

[Adam W]

I took the way the original post was worded to mean the fuses were changed for a lower rating.
In either case it should be safe to assume the manufacturer has fitted the correct size fuse for what they have manufactured.

 

[IQ Electrical]

I took the way the original post was worded to mean the fuses were changed for a lower rating.
In either case it should be safe to assume the manufacturer has fitted the correct size fuse for what they have manufactured.

Yes, he downrated the fuses solely on the basis that the unit was 'only a few watts', rather than looking at the flex CSA and any inrush of the actual appliance.

 

[gdrms]

Ha, thanks guys. Yes, I believe there is a boost on them and the cable is 1mm so 10A would be correct for the cable. It's just that as the regs seem to only believe in 3A and 13A I was thrown off track. I can see the logic for the car battery chargers but they have them on the cordless chargers also. Learning curve for me.

 

[Adam W]

Yes, he downrated the fuses solely on the basis that the unit was 'only a few watts', rather than looking at the flex CSA and any inrush of the actual appliance.

My point was more about inrush currents and manufacturers fitting a higher fuse than you might expect, but yes the cable size should also be considered.

 

[SirKit Breaker]

The regs for in service test and inspection of electrical equipment does state 3a or 13a fuses should be fitted. Manufacturers instructions override rules and regulations, so if a 10a fuse is specified, then a 10a fuse it is.