Thanks Richard - you're right. The North American requirements are made abundantly clear, both in overseeing doc's like the NEC and CEC and in various standards (esp. CSA No. 0 which also covers the keep-out zone required for the lock-nut).
It's the European picture that needs clarification, in particular regarding EN60950 compliant equipment, and the common single-phase branch circuits such as 230Vac, 16A, 2-wire plus ground. Thanks, Jim > -----Original Message----- > From: WOODS, RICHARD [SMTP:[email protected]] > Sent: Thursday, October 07, 1999 8:47 AM > To: '[email protected]' > Subject: RE: Conduit entry dimensions > > > Folks, all of the information on NEMA sizes is moot since the original > question was regarding metric sizes - 16 mm in particular - used in > Europe > and most elsewhere in the world. Any information on holes for metric > fittings would be appreciated. > > ---------- > From: Bill Lawrence [SMTP:[email protected]] > Sent: Thursday, October 07, 1999 10:29 AM > To: Lacey,Scott; 'Jim Eichner' > Cc: '[email protected]' > Subject: Conduit entry dimensions > > > Some dimensions for typical sizes of knockouts: > > Nominal Size of Conduit Knockout Diameter > > 1/2 0.859 / 0.906 > 3/4 1.094 / 1.141 > 1 1.359 / 1.406 > 1 1/4 1.719 / 1.766 > > A source of the data is NEMA ICS 6. > > > > Bill Lawrence - Factory Mutual Research > > > > At 09:06 10/07/1999 -0400, Lacey,Scott wrote: > > > >Jim, > >I took a few quick measurements of workboxes, isolation > transformers, etc. > >in the lab, as well as the knockout openings in the cast > housings > of some of > >our flow transmitters. > >7/8" and 1 1/8" seem to be the most common for the smaller > circuits, with 2 > >3/8" and 2 3/4" used for the heavier stuff. Check a Hubbell > catalog for > >required sizes for cable grips, etc. > > > >Scott Lacey > > > > -----Original Message----- > > From: Jim Eichner [SMTP:[email protected]] > > Sent: Wednesday, October 06, 1999 5:49 PM > > To: 'EMC-PSTC - forum' > > Subject: RE: EN60950 - conduit entry dimensions > > > > > > I have received very little response to this one, so I > thought I'd > >post > > it again. > > > > Aren't there any permanently connected ITE equipment > mfr's > on this > > forum?! What do you provide in the way of knockouts or > ...??? > > > > Thanks, > > > > > > Jim Eichner > > > Senior Regulatory Compliance Engineer > > Statpower Technologies Corporation > > [email protected] > > http://www.statpower.com > > Any opinions expressed are those of my invisible friend, > who > really > > exists. Honest. > > > > > > > -----Original Message----- > > > From: Jim Eichner [SMTP:[email protected]] > > > Sent: Thursday, September 23, 1999 10:49 AM > > > To: 'EMC-PSTC - forum' > > > Subject: EN60950 - conduit entry dimensions > > > > > > > > > Greetings all: In clause 3.2.2 allows the provision > of > knockouts, > > > cable > > > entries, etc. in lieu of a non-detachable power cord > for > >permanently > > > connected equipment. In Table 10, it lists the > overall > diameter > >of > > > conduit based on the number of conductors involved, up > to > 16A. > > > > > > In my particular application, there are 2 wires plus > earth, and > >the > > > current (and the branch circuit protection) is less > than > 16A, so > >the > > > table tells me I need a knockout that can accommodate > a > 16.0mm > >O.D. > > > conduit. If things are done there anything like they > are > done > >here, > > > this 16mm conduit will be secured in a fitting of some > sort, and > >the > > > knockout needs to be matched to the fitting, not the > conduit (i.e. > >a > > > 16mm hole is likely too small). > > > > > > Is there a reference, or can anyone tell me, what the > appropriate > > > sized > > > hole will be? Is this standardized somewhere? > > > > > > Thanks in advance for your help, > > > > > > > > > Jim Eichner > > > > Senior Regulatory Compliance Engineer > > > Statpower Technologies Corporation > > > [email protected] > > > http://www.statpower.com > > > Any opinions expressed are those of my invisible > friend, > who > >really > > > exists. Honest. > > > > > > > > > --------- > > > 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). > > > > > > > --------- > > 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). > > > > > >--------- > >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). > > > > > > > > > > Bill Lawrence > South Yarmouth, MA 02664 > [email protected] > > > --------- > 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). > > > --------- > 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). > --------- 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).
