So i need a power block (one of these things)
https://www.amazon.co.uk/Belkin-E--Plug-SurgeStrip-White/dp/B0002AG0F2/ref=sr_1_7?ie=UTF8&qid=1471895037&sr=8-7&keywords=belkin+surge+protector
for my PC but as i was going to buy it i noticed it said
Features a 238 J energy rating
Now i don't know what that means in Watts but i assume J is the same as W (physicists please correct me if im wrong) so my question is if i have a 550W PSU will this power block manage to draw that amount of power safely?