EEVblog #712 - Uni-T UT71E Multimeter (Why Uni-T Meters Suck)

[Wytnucls]

So if these meters with the BS 1363 fuses were rated for 250 volts RMS maximum they would be OK or not?

I don't think that there is a CAT rating for 250V. 300V or 150V only. Fuses also need to have a rating of 50kA or equivalent to voltage/lead impedance.
BS1362 are rated for 240V AC 6kA. There may also be an issue with the lack of a DC rating.
If I remember correctly, fuses must also be rated FF (very fast blow). The BS1362 is fast medium blow.

Bussmann fuse: http://docs-europe.electrocomponents.com/webdocs/0279/0900766b80279c60.pdf

[Lightages]

Yes, Wytnucls is correct. I spoke too quickly.

[soren]

HRC fuses rated for 1000V are available in the 1.25" x 0.25" size from reputable manufacturers. That tells me that the 1" x 0.25" BS1362 fuse is probably good for at least 800V in practice.

[Wytnucls]

What you're happy with is your personal choice.
What matters is that no meter can be legally sold in Europe fused with a BS1362 anymore, unless rated CAT II 150V perhaps.

[Lightages]

The point is that there is no 250V category, 150, 300, 500  600 and 1000V only.

[rolycat]

The point is that there is no 250V category, 150, 300, 500 and 1000V only.

Probable typo there - that should be 150, 300, 600 and 1000V.

[Fungus]

only 150v ? 
arent those rather common in 250v AC plugs? not proper even for 250v ?

The two things aren't equivalent.

Mains plug fuses are there to cut the power if there's a short-circuit inside the connected device.

Multimeter CAT ratings are about protecting people from transient power spikes.