Static issues in other industries
An interesting discussion but I was surprised that a 10000 ohm resistance mentioned previously was acceptable for the earth rod - I would have expected something no more than 1000 ohms (by way of comparison, earth networks for electrical installations have an earth resistance of a few ohms maximum)
Static electricity is a serious problem in many other industries I have been involved with - exploding grain silos appear in the news every few years & a colleague of mine was working on a bulk powder wagon for BR. When they tested the discharge mechanism the static from the fast moving dry powder caused it to flashover internally, fortunately without anyone being injured.
PS I think car tyres usually include carbon black to ensure that any static can safely discharge to earth & the plastic tanks are very carefully specified to prevent static.
Last edited by HowardB; 16th December 2023 at 14:40.
Reason: Postr Script added