Can we send pics to this list? I noticed on most poles between power and nonpower lines there is a plastic looking black ring wrapped around the pole. Is this a marker of sort for seperation?
John Buwa Michiana Wireless,Inc 574-233-7170 Sent from my iPhone On Sep 9, 2009, at 8:51 PM, AJ <aj.grant...@gmail.com> wrote: > The work we do with Idaho Power here requires us to be 30" below the > lowest > conductor (grounded neutral in our case) from power and 40" from the > lowest > primary distribution. However, if triplex is coming off the pole > (secondary > single phase 120/240v from transformer to house, basically the power > drop), > we have to be 40" below the attachment point of the secondary and > 30" apart > at the lowest sag point mid-span. > > The 40" applies to basically primary below 13kv... Above 13kv, i.e. > 14.4kv > or 24.94 kv, we have to be at least 43" below the lowest primary > conductor > or any part of the insulator of the conductor at a cross arm. > > As far as attachment at the pole, we're required to maintain 12" > between the > centers of the attachment bolts between CATV, Phone and any other > communications provider, i.e. point to point fiber, alarm, > government fiber, > etc. Any amplifier or other device on the line, including drip loops > on > hardline coax, have to maintain 6" clearance from any other > communications > cable. > > With that being said, for new attachments with ice loading, we have to > maintain the lowest possible sag of 15' 6" which leaves us at > between 17' > and 19' AGL at the attachment. Combine this is a transformer and > residential > triplex drop leaves you with three, sometimes less, eligible > communications > attachments on the majority of the shorter 45' and 55' poles. > > In some of our more crowded corridors, we've gone to cross arms > where we can > load up 4 to 6 utilities horizontally rather than vertically, > however, this > is usually to compensate for sag at mid span or too short of a pole > for 6 > attachments to begin with. > > You're looking for NESC Joint Use with is between sections 230 and > 238 I > believe... > > > On Wed, Sep 9, 2009 at 5:06 PM, Sales <sa...@michianawireless.com> > wrote: > >> >> Does anyone know exactly what the nesc codes for fiber on poles are? >> We have a run that we want to do and the poles are kinda crowded. The >> electric company told us the phone company has to stay on bottom and >> there has to be certain gaps. If they have to move people up to make >> room they may need to replace poles at our cost. He said we can be >> the >> judge for free if we follow nesc codes and estimate if we can find a >> gap anywhere. So what exactly are we looking for ? >> >> >> >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > --- > --- > --- > --- > -------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > --- > --- > --- > --- > -------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
