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/
