Electricity & magic

[salilouisa]

No: HPFGUIDX 180497

Barry:
I've been informed on this site that magic interferes with electrical
devices. Since platform 9 3/4 is a pretty large magic site, I'm
wondering how this affects the power on all the other platforms.

Sali:
Is it the entire site that's magical or is it just the entrance and
whatever shielding is needed to hide the platform from muggles? If it
doesn't take much magic to hide the site then it might not interfere.
And how much magic is needed before it starts to interfere with
electricity on a large scale? Hogwarts we know causes problems. Does
12 Grimmauld Place? I can't check my books to see if it mentions
street lights working/not working in the vicinity.

I start to wonder how often platform 9 3/4 is used. If it does
interfere badly but is only used twice a year, it would be easier for
problems to go unnoticed.

Sali, now wondering if the problems that the British rail system has
can be due to the Hogwarts express rather than leaves on the line or
the wrong kind of snow.