https://www.automationdirect.com/adc/Shopping/Catalog/Circuit_Protection_-z-_Fuses_-z-_Disconnects/UL_1077_Rated_Supplementary_Protectors/Double_Pole_Supplementary_Protectors_(0.5A-63A,_FAZ_Series)/D_Curve_(0.5A-40A,_FAZ-DXX-2)

$18 for a two pole breaker.  Din rail is about $1.00 /ft.
You shut it off before sticking your hands in the drive/motor wiring.  
It is right there and you can see it and not have to "remember" if you 
pulled the plug or not.  You will do that a lot as you start up a new 
CNC machine.

Dave


On 11/1/2016 9:40 AM, John Alexander Stewart wrote:
> Andy - that's a good point about "plug-in" equipment.
>
> The lathe with original motor does not have a fuse, nor does my larger
> plug-in lathe, nor my mill. All with capacitor start "2-phase" motors;
> either 120v or 240v. My 240v circuit is fused for 15A. I generally only run
> 1 machine at a time, so one 15A 240v circuit has done me well for a couple
> of decades.
>
> Maybe I'm over thinking this...
>
> John.
>
>
>
>
> On Tue, Nov 1, 2016 at 8:59 AM, andy pugh <[email protected]> wrote:
>
>> On 1 November 2016 at 12:33, John Alexander Stewart <[email protected]>
>> wrote:
>>> The VFD suggests 10a external fuses, plus a line filter. I'm running this
>>> on 240v, over here in North America.
>> I don't know what your standards are in the US, but as the lathe is
>> "plug-in" equipment it may be that it doesn't matter.
>> I tend to prefer MCBs to fuses. In the UK the domestic-wiring
>> suppliers only go down to 3A, which may be too big for some equipment
>> wiring. My 12V/60W power supplies ended up with 1A class D breakers
>> from RS but even those were not slow enough for the PSU inrush
>> current.
>>
>> For the input-side filter, search eBay for the "Rasmi" brand. Lots of
>> different types and pretty inexpensive.
>>
>> --
>> atp
>> "A motorcycle is a bicycle with a pandemonium attachment and is
>> designed for the especial use of mechanical geniuses, daredevils and
>> lunatics."
>> — George Fitch, Atlanta Constitution Newspaper, 1916
>>
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