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Exd enclosure (flameproof)

Exd enclosure (flameproof)

(OP)
I'm looking for some advice on changing a component within an Exd enclosure and I'm not sure if this change would mean the box needing to be recertified by the manufacturer. We want to change out a Pepperl & Fuchs barrier and replace this with a Pepperl & Fuchs trip amplifier. The power consumption of the identically sized unit would increase by aroun 1 watt. I seem to recall that no changes are permitted. Can anyone advise?

RE: Exd enclosure (flameproof)

In my experience, okgd, any changes to a certfied box, or more importantly, a box certified with componentry, requires that the box be recertified.  Given the increased power of 1 W, I would hope the original certifying authority would do this with paperwork ($1000??).  If business is slow there, they'll probably charge more. winky smile

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