On 7/13/2012 5:42 PM, Missouri Guy wrote:
> 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@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...)
It varies from state to state and local to local.
Check with your county, township, or City zoning.
73
Roger (K8RI)
>
>
> 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@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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