[TowerTalk] NEC and tower power question

[Missouri Guy]

OK, thanks Mickey!  That 12" minimum above grade
for the bottom of the box is reasonable and adequate for my needs.

I agree on the single point grounding/bonding. 

73,
Charlie, N0TT

On Fri, 13 Jul 2012 17:09:03 -0400 Mickey Baker <fishflorida at gmail.com>
writes:
Hi, Charlie,


NEC requires a minimum of 12" above grade, requires plastic conduit a
minimum of 18" below ground, so that's a 30" conduit piece, elbow to
outlet MINIMUM. UG buried wire requirement is to be buried 24" below the
surface.


Your local code may be more stringent, particularly in areas (like MO)
where the ground freezes and has a tendency to push things to the
surface, and like here where it rains heavily and there's a 24" above
grade requirement for outlets (I believe...)


I'm sure someone else will chime in, grounding being a favorite topic
here, but, your ground systems should be bonded at a single point, not
necessarily at the outlet box. If he's reading, Jim Lux is a credible
expert on grounding.


73,


Mickey N4MB




On Fri, Jul 13, 2012 at 4:36 PM, Missouri Guy <n0tt1 at juno.com> wrote:

Hi Gents,

I will want to install a 20amp 117V AC outlet at my new tower base.
I'll use a GFCI receptacle and "wet locations" box and cover,
but I was wondering what the National Electical Code says
about the minimum HEIGHT above ground for the box?

Also, I should bond the AC protective grounding lead to the tower
ground, right?

73 and thanks,
Charlie, N0TT
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-- 
Mickey Baker, N4MB
Fort Lauderdale, FL
“Tell me, and I will listen. Show me, and I will understand. Involve me,
and I will learn.” Teton Lakota, American Indian Saying.