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#122582 - 12/02/05 08:01 PM Scope of 300.5 (D) (3)
electure Offline

Member

Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
300.5 (D)(3) Requires a warning ribbon at least a foot above unencased service conductors that are buried more than 18" deep.
Don't you think that this should be required on other underground installations as well?



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#122583 - 12/02/05 08:08 PM Re: Scope of 300.5 (D) (3)
skingusmc Offline
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Registered: 05/27/04
Posts: 116
Loc: Simi Valley, CA USA
You mean this isn't a "warning" to AHJs? (grin)

Steve
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#122584 - 12/03/05 01:08 AM Re: Scope of 300.5 (D) (3)
Trumpy Offline

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Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Scott,
Did you get that strip from the local cemetary?.
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#122585 - 12/03/05 01:33 PM Re: Scope of 300.5 (D) (3)
renosteinke Offline
Cat Servant
Member

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
I think the proper cite(s) would be 90.2 and 90.4.
(Especially in regards to enforcing non-existant requirements or the use of no-existant equipment).

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#122586 - 12/03/05 04:58 PM Re: Scope of 300.5 (D) (3)
e57 Offline
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Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
Upon finding this tape in the ground do you hand dig, or continue with a back-hoe?
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"Well - I oughta....." -Jackie Gleason

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#122587 - 12/05/05 04:53 PM Re: Scope of 300.5 (D) (3)
electure Offline

Member

Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
OK, maybe the example is a little silly, but I think my question is a valid one.

Why should it be a requirement to put a warning ribbon above a 100 Amp residential 120/240 Volt service lateral, maybe fed by a 25 KVA transformer, when there's no requirement to provide the same type of warning above a 1000 Amp 480 Volt feeder?

Is my reasoning even goofier than usual? What am I missing here?

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#122588 - 12/05/05 05:24 PM Re: Scope of 300.5 (D) (3)
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
IMO your right, it makes no sense to me that this only applies to service conductors.
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Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#122589 - 12/05/05 05:28 PM Re: Scope of 300.5 (D) (3)
HLCbuild Offline
Member

Registered: 12/05/04
Posts: 206
Loc: Herndon,Va USA
You guys are thinking too much again!

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#122590 - 12/06/05 06:37 AM Re: Scope of 300.5 (D) (3)
sandsnow Offline
Member

Registered: 09/21/04
Posts: 163
Loc: Irvine, CA, USA
Scott
Read 300.5(D) It is refering to direct buried conductors and cables. This does not apply to service conductors or laterals in conduit.

I've never heard of any direct buried cables encased in concrete though.

I agree that UG conductors in general need more attention from the code in regards to protection.
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Larry LeVoir
Inspector
City of Irvine, CA

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#122591 - 12/06/05 10:54 AM Re: Scope of 300.5 (D) (3)
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
It also doesn't make any sense that this only applies to condutors installed in a trench, not those installed by directional boring.
Don
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