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#43353 - 10/11/04 01:10 PM RG59 Conduit Fill
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
Hi,
I need to calculate how many RG59's constitute 40% fill in a 2" conduit.

I am having trouble finding any reference for this.

I have been looking for OD dimensions but havent had much luck..

any suggestions or help is appreciated.

Mustang
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#43354 - 10/11/04 01:15 PM Re: RG59 Conduit Fill
Ryan_J Offline
Moderator

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
I don't see where article 820 references conduit fill. I'm not sure that you are limited to 40% fill.
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#43355 - 10/11/04 01:20 PM Re: RG59 Conduit Fill
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6804
Loc: Brick, NJ USA
Mustang:
Other than doing it the 'old fashioned way (measure the diameter & do the math) I can't put my finger on anything.

Did you try the mfg????

Venturing a guesstimate.....coax is visually 'close' to #4 or #6 THHN????

John
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#43356 - 10/11/04 01:23 PM Re: RG59 Conduit Fill
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
hi,
the 40% fill requirement is a client spec..i found out that RG59 is 7/16" in diameter. THIS IS SIAMESE CABLE.
So i guess i could just do a calculation just like for a regular ckt?

This is also a combo cable with 2 #18 awg installed with the RG59.

Thanks for the replies.

Mustang

[This message has been edited by mustangelectric (edited 11-01-2004).]
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#43357 - 10/11/04 01:56 PM Re: RG59 Conduit Fill
stamcon Offline
Member

Registered: 03/24/01
Posts: 322
Loc: So San Francisco CA
RG59 is only ┬╝" OD.

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#43358 - 10/11/04 02:47 PM Re: RG59 Conduit Fill
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
hi,
thanks for the replies...take a look at the following document. it has some interesting information regarding rg59 conduit fill.
http://www.brownstown.com/downloads/conduit-fill_require_.pdf

i got my dimension information from here: http://www.engproducts.com/products.cfm?ID=318

Still not sure. This is a COMBO CABLE/ COAX/#18 AWG PAIR

That was the best I had found until now!

Thanks for the replies..

regards

Mustang
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#43359 - 10/11/04 03:47 PM Re: RG59 Conduit Fill
Scott35 Offline

Broom Pusher and
Member

Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
Mustang;

 Quote:

This is a COMBO CABLE/ COAX/#18 AWG PAIR


This is "Technically" known as "Siamese" or "Siamese Cable".

Installed apx. 100,000 KM of the stuff!

The PVC (CMR, Riser, etc.) type Jacketed Cable has a larger O.D. than the Plenum (CMP) type Jacketed Cable.
Also, the Plenum Rated stuff pulls through Conduits better, but costs 2× - 3× the $$$ of PVC (Riser) Cable.

Cable Manufacturers will have the O.D. displayed on their web sites.

Scott35

BTW, thanks for the links! Will check 'em out.
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#43360 - 10/11/04 04:47 PM Re: RG59 Conduit Fill
golf junkie Offline
Member

Registered: 04/22/01
Posts: 511
Loc: York, NE
I am interested for the same information for Cat 5. I know I can calculate it from the tables given but I would like a chart for Cat 5 in emt if it is available.

thanks,
GJ

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#43361 - 10/11/04 04:47 PM Re: RG59 Conduit Fill
e57 Offline
Member

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
The 40% fill req. is more of a TIA/EIA req. rather than NEC req.

If you do tele/data, or CATV etc. you may want to check these out. They are not all of the standard in it's actual format, but seeing that the go for $200 bucks each, these trunkated versions/explanations are just fine. Also very informative.....
http://web.anixter.com/Anixter/anixter.nsf/Standards?OpenForm

--------------------------------
Just looked at them again, the pages have changed, they used to have a lot more information on them before.




[This message has been edited by e57 (edited 10-11-2004).]
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#43362 - 10/11/04 06:21 PM Re: RG59 Conduit Fill
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
Hi,
I thought the Siamese cable was a FLAT type cable with the conductors run side by side more like a UF cable?

I thought the COMBO cable was a ROUND cable assy that is more like a MULTI COND TRAY CABLE?

I am working on a project where there are a lot of video cameras. Is RG59 not an outdated cable? It seems that all I ever hear about anymore is RG6..Is RG6 more digital friendly?

Thanks for the replies..very interesting information...you never know when this type work comes along..and it helps to stay informed.

regards

Mustang
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