# How can I calculate if switching power strip on and off is safe

I am a total noob when it comes to electricity and find this questions hard to search answers for on the internet. I have the below setup:

• Dell screen 1.5a * 230v = 345w
• Dell screen 1.5a * 230v = 345w
• Samsung screen 1a * 230v = 230w
• Samsung screen 1a * 230v = 230w
• BASF stereo amp 200w (8-16 ohm, does this matter ?)
• WD Elements 0.6a * 230v = 138w
• YANEC laptop charger output 90w, input unspecified (il assume input of 50w)

sum all = 1578w

all connected to Konig power strip with max 3680W max 13500a surge protection (it has this small extra button which is the surge protection)

I am in Belgium hence the 230v.

I used to have a similar setup with another screen and my desktop pc also connected to the power strip. One day the power strip made a poof sound when I switched it on and stopped working for a while, all appliances where fine except for the computers PSU which was fried.

My little knowledge of electricity tells me that I just have to compare the wattage. So in this case 1578w < 3680w so I should be safe. But someone told me that the appliances will draw more at the moment my power strip is turned on. This would explain also how I fried my PSU.

So my question to you guys: can I safely switch my power strip on and off too effectively use it as an on/off switch for all appliances at the same time? Or will I fry one of them at some point?

Also, yes, I am aware that I could have avoided destroying my PSU if I had done this research earlier.

• I agree with the JACK answer that the fried PSU caused the breaker in your power strip to open, not the other way around. Mar 27, 2020 at 17:30
• I would look at the sourcing of the power strip that failed. Did you buy that at a retail shop inside the EU? Or is it a mail-order special? Mail-order is not safe inside the EU because dodgy companies are using it to bypass EU auality and safety regs. Just look at any of BigClive's teardowns on Youtube. Mar 27, 2020 at 17:50
• Re: laptop charger, not really significant in failure of PSU or surge suppressor, but you won't get more power out than power in, plus the power supply will use some energy in the voltage conversion process, so input watts will exceed output watts. Mar 28, 2020 at 16:38