ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by jwes2699. 01/21/18 05:58 PM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (jwes2699), 9 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Carflex / sealtite #52860
06/09/05 07:21 PM
06/09/05 07:21 PM
N
NJ Wireman  Offline OP
Member
Joined: Aug 2004
Posts: 186
New Jersey (South Jersey)
My question is in regards to the lenght of a whip from a disconnect means to the unit ie as for a res. ac unit the disconnect is mounted to the home what is the length the carflex etc can be from that disconnect to the unit befor it is no longer leagal and has to be piped? Alittle long winded sorry bout that. I have been advised no longer the 6' please be spec. and state a code ref.# if poss

Work Gear for Electricians and the Trades
Re: Carflex / sealtite #52861
06/09/05 07:30 PM
06/09/05 07:30 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
There is no length limit at all.

You can not have more than 360 degrees of bend. 350.26

It will have to be supported properly. 350.30

Longer than 6' and a grounding conductor will have to be run. 250.118


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: Carflex / sealtite #52862
06/09/05 10:38 PM
06/09/05 10:38 PM
Z
zero76  Offline
Member
Joined: Oct 2004
Posts: 26
olympia
Legal issues aside,i think flex should always have a ground wire. Ive seen too many flex connectors come apart and compromise safety for minimal cost gain.
z...

Re: Carflex / sealtite #52863
06/10/05 12:36 AM
06/10/05 12:36 AM
N
NORCAL  Offline
Member
Joined: Sep 2002
Posts: 876
Isnt Carflex non metallic?

Re: Carflex / sealtite #52864
06/10/05 02:42 AM
06/10/05 02:42 AM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
There is lots of mention of 6' in flexible conduits, allowing and dis-allowing in different ways, and all kinds of exceptions, that are easily confusing.

350.60, 356.60 both require a ground for equipment where flexibility is required. Also see 250.118(6,7+8)which limit ground path to 6 feet. But only with metal flex...

Sealtight? Metal? Carflex (Carlon) is LFNC, plastic, no ground path.

Quote
356.10 Uses Permitted.
LFNC shall be permitted to be used in exposed or concealed locations for the following purposes:
FPN:Extreme cold may cause some types of nonmetallic conduits to become brittle and therefore more susceptible to damage from physical contact.
(1) Where flexibility is required for installation, operation, or maintenance
(2) Where protection of the contained conductors is required from vapors, liquids, or solids
(3) For outdoor locations where listed and marked as suitable for the purpose
(4) For direct burial where listed and marked for the purpose
(5) Type LFNC-B shall be permitted to be installed in lengths longer than 1.8 m (6 ft) where secured in accordance with 356.30
(6) Type LFNC-B as a listed manufactured prewired assembly, metric designator 16 through 27 (trade size 1/2 through 1) conduit

356.12 Uses Not Permitted.
LFNC shall not be used as follows:
(1) Where subject to physical damage
(2) Where any combination of ambient and conductor temperatures is in excess of that for which the LFNC is approved
(3) In lengths longer than 1.8 m (6 ft), except as permitted by 356.10(5) or where a longer length is approved as essential for a required degree of flexibility
(4) Where voltage of the contained conductors is in excess of 600 volts, nominal

356.30 Securing and Supporting.
Type LFNC-B shall be securely fastened and supported in accordance with one of the following:
(1) The conduit shall be securely fastened at intervals not exceeding 900 mm (3 ft) and within 300 mm (12 in.) on each side of every outlet box, junction box, cabinet, or fitting.
(2) Securing or supporting of the conduit shall not be required where it is fished, installed in lengths not exceeding 900 mm (3 ft) at terminals where flexibility is required, or installed in lengths not exceeding 1.8 m (6 ft) from a luminaire (fixture) terminal connection for tap conductors to luminaires (lighting fixtures) permitted in 410.67(C).
(3) Horizontal runs of LFNC supported by openings through framing members at intervals not exceeding 900 mm (3 ft) and securely fastened within 300 mm (12 in.) of termination points shall be permitted.


Long story short, longer than 6', it needs to be supported at 12", and every 36".


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: Carflex / sealtite #52865
06/10/05 04:48 PM
06/10/05 04:48 PM
N
NJ Wireman  Offline OP
Member
Joined: Aug 2004
Posts: 186
New Jersey (South Jersey)
Thanks for all the replys and thanks e57 for the code ref. its great having this site handy at all times!!!!!!!!!!!!!!!!


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Admin
Admin
NY, USA
Posts: 3,481
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 16
Potseal 15
Popular Topics(Views)
243,586 Are you busy
180,381 Re: Forum
170,859 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.020s Queries: 14 (0.004s) Memory: 0.9765 MB (Peak: 1.1223 MB) Zlib enabled. Server Time: 2018-01-22 00:35:04 UTC