Electrical Q

Are you going to fit a dedicated earth rod? not mandated, but explaining that "little tingles are normal" to the hot tub users might not go down well

Everyone's favourite sweary sparky

AFAIAA no limit if the isolator can be locked off with lockout padlocks under the control of the maintaince operator.

Owain

Hmm, so many stereo systems seem to be 2 core and you get a belt when you plug in the aerial. OK its only a small charge but why don't they fix it by using three core like on computers etc. Yes anything metal in a bathroom with an electricity supply is best earthed. Brian

It isn't necessarily easier, but it does mean you can sell it in countries that normally use 2-pin sockets.

So what exactly makes the aerial connection of a double insulated device easier to implement that that of an earthed product? John

With a stereo amplifier. no, but many household boxes are receiver-amplifiers, as my current and also my last one were.

Internal AM, but we only have stereo on FM, which needs at least the proverbial bit of wet string. A bit of curtain track about five feet long works here, centre-fed with a lightweight twin feeder. A bit of care with impedances will maximise the signal.

You still haven't stated why you think double insulated is easier than earthed.

John

The reasons for double insulated is to eliminate 'hum loops' as the theory is the metal cases of all the kit will be grounded by the power amplifier alone. Grounding chassis via two different paths leads to induced mains frequency currents in the loop so formed, and with sensitive kit, enough Vdrop to be amplified to audible levels.

In article snipped-for-privacy@pvr2.lan, Rod Speed snipped-for-privacy@gmail.com scribeth thus

And call that an Aerial?, no wonder peoples radio reception is often piss poor;!...