On 12 Oct 99, at 13:29, Jim Eichner wrote: > > Aha! Now I understand why EN60950 only tells us about the OD of the > > conduit: because that's the same as the OD of that part of the > > conduit hub that mates with your enclosure! If (big IF) the methods > > explained below for the UK also apply everywhere else in Europe, then > > I have part of my answer. We would simply make the knockout slightly > > larger than the OD of the conduit. > > > > There is another question still to be answered though. Is the 16mm OD > > in EN60950 truly correct, or is it really 16mm ID as discussed > > earlier?!
I hadn't offered any help (?!) on conduits before, as though I use them, I don't really know much detail about them - I just specify M20 clearance for conduit termination. So I phoned a British steel conduit manufacturer - after a bit of searching, a helpful young lady told me that for their 16mm, the inside diameter is 13.2mm with wall thickness of 1.4mm (which makes 16mm outside diameter, my mental arithmetic tells me). I also looked in a couple of catalogues for flexible conduit - here it all depends on the construction of the particular maker's conduit, but the termination at the end will always fit in an M16 tapped hole or through a clearance hole (say 16.5mm). As an example, PMA UK Ltd's UL recognized Heavy Duty flexible conduit has an I/D of 11.6mm and an O/D of 15.8mm; Anaconda Sealtite is 12.6mm I/D, 17.8mm O/D; Kopex International Stainless Steel I/D 13mm, O/D 16mm. That's for the UK. Whether Europe is the same....? Regards, Mark -- Mark Hone Wellman CJB Limited Email: [email protected] Airport Service Road Tel: +44 (0)2392 629239 (Direct) Portsmouth, Hampshire Tel: +44 (0)2392 664911 PO3 5PG, ENGLAND Fax: +44 (0)2392 697864 --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
