SoTM SPS-500 Power Supply help required

Audio Gear Talk SOtM
1

This is quite a bizarre request for help from any owners of this power supply to ask them to look at the kettle lead plug to see what amp rating the fuse is:grinning:
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To explain, recently I had my hifi room redecorated and had to remove all the hifi kit to another room for storage and had removed all the various power leads to do this. When I went to set it all back up again I realised I had two kettle leads, one will be for the SPS-500 and the other one for my CD transport but I’m unsure which is for which. One plug has a 13amp fuse, the other has a 5amp fuse and I’m reluctant to attach the incorrect kettle lead to the SPS-500 due to it being a power supply and the potential damage that could cause. So if anybody could check their plug I would be eternally grateful!!

Thanks so much.

2

I do run a sPS-500, but (un)fortunately i am in Sweden and we dont fuse our “kettle leads”…
I can however assure you that neither of your devices will blow a fuse under normal circumstance! I wouldn’t worry!
Device protection is always in the device, isn’t it?

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3

I have four of them

All on US style unfused plugs

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4

Assuming the SPS-500 is a 500 VA supply, it should really be fused with a 3 Amp fuse. The CD transport also wants a maximum 3 Amp fuse. For mains fuses, I use the lowest rating that doesn’t blow under normal use - as low as 1 Amp for some devices.

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5

Thanks for replies. I managed to track down an SPS-500 owner from the UK who told me his kettle lead had a plug with 13 amp fuse.

6

As there must be fuses inside components to protect them for proper CE compliance, UK style plugs‘ fuses usually only have the function to protect the cable itself from getting overloaded - the plug should sport an imprint regarding its amperage, so insert fuses as indicated …

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7

It’s a quite small switch mode power supply, i think it delivers a max of 3Amps, at up to 19V… so a max of about 60VA.

Still, the device needs to separately fused, right? The kettle leads fuses are to protect the power grid should something happen to the lead itself?

8

Just make sure that all your fuses are audiophile quality :wink: :stuck_out_tongue_winking_eye:

9

Kettle lead fuses are intended to limit the magnitude of any fault current and minimise the risk of fire.

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10

I routinely see 10 Amp IEC leads in the UK supplied with 13 Amp fuses fitted. Regardless of cable rating, I always swap out the fuse to a value more appropriate to the appliance load.

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11

13 amps @ 220vac ? :open_mouth:

12

240 V AC here in the UK. Everyone thinks it’s 230 V though because we redefined it as 230 V +6%/-10% to harmonise with Europe a good number of years ago. We didn’t change the voltage though, which has always been a nominal 240 V.

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13

Very interesting, thanks!