W K wrote:
"Dr Ivan D. Reid" wrote in message
...
On 10 Sep 2003 15:31:14 -0700, robsignals
wrote in :

detection relays, connected via 1,200:1 transformer, are rated 1Amp or
5Amp with a wide ranging multiplier, 5A was specified but 1A installed

They were carried out but I guess those engineers assumed they had
been handed over correctly installed equipment and never thought to
check the relay rating, pity they aren't brightly colour coded.

Given that there appear to be only two different ratings, an obvious
question is, "Why not?"


The cost of producing the item? Perhaps they aren't made?

You'd hope that the maintenance engineers actually bothered to read things.
Perhaps if the correct colour code was yellow they might stuff a banana in
by mistake.

The company my late father worked for made various control
components for applications such as petrochemical plants,
nuclear power-stations, oil-refineries etc. The components
were colour-coded as to their intended use/ratings.

On one occasion, the wrong component got fitted, which
caused a major shutdown which then resulted in a significant
lawsuit [this was in the USA back in the 1970s].

"It should have been made obvious by colour-coding that
the wrong unit was fitted" said the refinery-company's
lawyers.

"The units are colour-coded according to use and rating"
my father's company replied.

"The fitter who fitted it is colour-blind" admitted the
refinery operators after some days of the trial.

Oops!

-PeteL.