The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Calling all Non-US members!! (Non-US only)
by aussie240
Today at 02:39 AM
Photo Upload Tutorial
by DanK
Yesterday at 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
2 registered (DanK, LongRunner), 228 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#79199 - 12/03/01 12:49 PM 300-5d
Scott Yeazell Offline
Junior Member

Registered: 12/03/01
Posts: 4
Loc: Springfield, OH, USA
Do underground service entrance conductors installed by directional boring method rather than trenching require a warning ribbon?

Top
2014 / 2011 NEC & Related Books and Study Guides
#79200 - 12/03/01 01:06 PM Re: 300-5d
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Yes. There were proposals made to provide such an exemption, but they were rejected. The chances of damage from future excavation do not change just because you used a closed rather than open excavation method for the installation. If you want to bore you will have to do it twice, one for the cable and one for the ribbon.
Don(resqcapt19)
_________________________
Don(resqcapt19)

Top
#79201 - 12/04/01 05:12 PM Re: 300-5d
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
As the result of a follow up question to me from Scott on this subject via e-mail I did some additional research. My original post is not entirely correct.
A proposal was submitted to the NFPA for a change in 300-5(d) for the 2002 code. This was proposal 3-43. The proposal asked that the following wording be added to 300-5(d): "Horizontally bored service laterals shall be exempt from this requirement." Code Making Panel 3 rejected the proposal with the statement that; "Present language only addresses trenching, not boring, thus boring is already excluded from the ribbon requirement".
This indicates to me that the panel did not intend to require a ribbon above cables that were installed by boring. It aprears to me, that based on the panel comment, if you are operating under the 99 code, a ribbon would not be required for conductors installed by boring. Also note the new wording applies to all underground service conductors, not just service laterals as in the 99 code.
Don(resqcapt19)

[This message has been edited by resqcapt19 (edited 12-05-2001).]
_________________________
Don(resqcapt19)

Top
#79202 - 12/06/01 05:14 PM Re: 300-5d
Nick Offline
Member

Registered: 08/13/01
Posts: 603
Loc: Riverside, CA
 Quote:
The chances of damage from future excavation do not change just because you used a closed rather than open excavation method for the installation.

I agree with this statement more than the panels findings.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals