If you have a power strip plugged into an extension lead, as in one to make the reach go further with just one plug socket, is that safe?
Edit: Also if I did have power strips chained together, would it make a difference if the power strip is inside a protective plastic box? Or would it be the wall socket I'd need to worry about?
DO NOT CHAIN POWER STRIPS UNDER ANY CIRUMSTANCES!
It has nothing to do with where you put it, or wall socket vs. the strip itself- it's about power overload. I'm gonna oversimplify this becuase I don't know the exact terms to describe it properly...when you chain up your power strips, each strip is trying to pull all the electricity for all its outlets at once, so it can redistribute. So, if you've got a six-outlet plugged into another 6 outlet... you're forcing the first strip to take double the power load it's designed to. Add another 6-outlet to the second strip, and you've got one running double and one running triple its designed load. Imagine installing a shelf that holds 10 pounds, and immediately putting 20 or 30 pounds on it. Think it's gonna stay on the wall? Just don't risk it, there's plenty of big strips out there!
As for power strip & extension cord... I wouldn't reccomend it, but it can be ok- IF you use a 1 outlet extension cord. If it's got 2 or 3 outlets on the end? That's not an extension cord, that's a tiny power strip!
For anyone having issues with outlet management, some reccomendations:
https://www.tripplite.com/I've never used their stuff, but Tripp Lite always comes up when I go looking around for good strips. They have an amazing reputation, but pretty standard size strips. Good for someone who doesn't keep everything plugged in at once.
Belkin 12 outlet pivot plug surge protector]Belkin 12 outlet pivot plug surge protectorI know, I know, Belkin is not the best brand out there... but this one gets a pass because of its unqiue design- the eight plugs on the sides rotate 90 degrees. So, if you've got some old systems with big boxy plugs (and I KNOW you do!), you can pivot the plug in-between them down and fit a regular size plug underneath.
https://x1up.com/These guys are where I went when it was time for the big guns. It's worth noting, these are NOT surge protectors, so not your best choice for rare equipment... but most of their stuff does have surge protection bulit in to 400 joules, so you're good to go for most things. These are not small strips- these are designed for power tools, so you'd better have the space for a few feet of outlets. On the plus side- this means far-spaced outlets to accomodate those big boxy plugs, and a LOT of outlets. My strip is 4 feet long with 18 outlets- they make the biggest strips I could find from someone trustworthy. How do I know I can trust them? I asked- they have excellent customer service & answered my questions about bringing such a big strip into an entertainment center. Oh, and the first thing they told me? Never chain your strips!