So, I'm planning to run PVC conduit underground from the house to the
new shed. The shed is on blocks rather than a slab, 11 feet from the
house. The good news is I have access to the space under the shed
(although not much room to work or dig). The bad news is that I can
expect the shed to settle a few inches over time.

Due to zoning requirements, I was forced to place the shed in a spot
where the door of the shed is at a 90 degree angle to the house and the
side of the shed is facing two large windows. Between the windows and
other obstructions, the only reasonable place to exit the house with
the electrical is between the windows. It would save me a ton of
digging (and kep the diggeng well away fromt he water pipes) if I could
just run the trench straight out from the house to the side of the shed
and run the conduit above ground, under the floor of the shed (attached
to the bottom of the floor I guess) and then up through the floor at
the front. Does this sound reasonable so far? I haven't found any
category in the NEC that this seems to fit into easily. (My county goes
entirely by the NEC).

Aside from the digging I have two other issues:

1) I expect the shed to settle, so the connections from the underground
conduit to the shed can't be too rigid. If I CAN run above ground
conduit under the shed, that solves the problem by using PVC and
running the first few feet at a slight upward angle under the floor. If
I have to run the conduit underground to the front and come straight up
through the floor, how do I handle this? A section of flexible conduit
somewhere? I could brobably make a sliding joint with two sizes of
conduit, but there's sure nothing about THAT in the NEC... They talk
about fittings with expansion joints, but that won't quite cut it.
Other ideas I'm not thinking of?

2) Running the conduit down from the eve, across the yard, up out of
the ground, under the floor and up is more degrees of bend than allowed
in one pull. The reasonable thing would seem to be to come out of the
ground at the side of the shed (under it?) and place a 90 degree,
weatherproof "pull box" there (it escapes me what those fittings are
called at the moment). Does this have to be a minimum distance above
ground like an outlet box in the yard, or if it's waterproof is it just
treated as part of the conduit?

People must deal with this issue on a regular basis, but I can't find
anything on an accepted method.

Thanks for your time...

You can run the pvc underground to the shed, use a long expansion coupling
where you exit the ground and run the pvc attached to the bottom of the
shed, then in. Use pull boxes where necessary


"Larry Fishel" wrote in message
oups.com...
So, I'm planning to run PVC conduit underground from the house to the
new shed. The shed is on blocks rather than a slab, 11 feet from the
house. The good news is I have access to the space under the shed
(although not much room to work or dig). The bad news is that I can
expect the shed to settle a few inches over time.

Due to zoning requirements, I was forced to place the shed in a spot
where the door of the shed is at a 90 degree angle to the house and the
side of the shed is facing two large windows. Between the windows and
other obstructions, the only reasonable place to exit the house with
the electrical is between the windows. It would save me a ton of
digging (and kep the diggeng well away fromt he water pipes) if I could
just run the trench straight out from the house to the side of the shed
and run the conduit above ground, under the floor of the shed (attached
to the bottom of the floor I guess) and then up through the floor at
the front. Does this sound reasonable so far? I haven't found any
category in the NEC that this seems to fit into easily. (My county goes
entirely by the NEC).

Aside from the digging I have two other issues:

1) I expect the shed to settle, so the connections from the underground
conduit to the shed can't be too rigid. If I CAN run above ground
conduit under the shed, that solves the problem by using PVC and
running the first few feet at a slight upward angle under the floor. If
I have to run the conduit underground to the front and come straight up
through the floor, how do I handle this? A section of flexible conduit
somewhere? I could brobably make a sliding joint with two sizes of
conduit, but there's sure nothing about THAT in the NEC... They talk
about fittings with expansion joints, but that won't quite cut it.
Other ideas I'm not thinking of?

2) Running the conduit down from the eve, across the yard, up out of
the ground, under the floor and up is more degrees of bend than allowed
in one pull. The reasonable thing would seem to be to come out of the
ground at the side of the shed (under it?) and place a 90 degree,
weatherproof "pull box" there (it escapes me what those fittings are
called at the moment). Does this have to be a minimum distance above
ground like an outlet box in the yard, or if it's waterproof is it just
treated as part of the conduit?

People must deal with this issue on a regular basis, but I can't find
anything on an accepted method.

Thanks for your time...

Larry Fishel wrote:
So, I'm planning to run PVC conduit underground from the house to the
new shed. The shed is on blocks rather than a slab, 11 feet from the
house. The good news is I have access to the space under the shed
(although not much room to work or dig). The bad news is that I can
expect the shed to settle a few inches over time.

Due to zoning requirements, I was forced to place the shed in a spot
where the door of the shed is at a 90 degree angle to the house and the
side of the shed is facing two large windows. Between the windows and
other obstructions, the only reasonable place to exit the house with
the electrical is between the windows. It would save me a ton of
digging (and kep the diggeng well away fromt he water pipes) if I could
just run the trench straight out from the house to the side of the shed
and run the conduit above ground, under the floor of the shed (attached
to the bottom of the floor I guess) and then up through the floor at
the front. Does this sound reasonable so far? I haven't found any
category in the NEC that this seems to fit into easily. (My county goes
entirely by the NEC).

Aside from the digging I have two other issues:

1) I expect the shed to settle, so the connections from the underground
conduit to the shed can't be too rigid. If I CAN run above ground
conduit under the shed, that solves the problem by using PVC and
running the first few feet at a slight upward angle under the floor. If
I have to run the conduit underground to the front and come straight up
through the floor, how do I handle this? A section of flexible conduit
somewhere? I could brobably make a sliding joint with two sizes of
conduit, but there's sure nothing about THAT in the NEC... They talk
about fittings with expansion joints, but that won't quite cut it.
Other ideas I'm not thinking of?

2) Running the conduit down from the eve, across the yard, up out of
the ground, under the floor and up is more degrees of bend than allowed
in one pull. The reasonable thing would seem to be to come out of the
ground at the side of the shed (under it?) and place a 90 degree,
weatherproof "pull box" there (it escapes me what those fittings are
called at the moment). Does this have to be a minimum distance above
ground like an outlet box in the yard, or if it's waterproof is it just
treated as part of the conduit?

People must deal with this issue on a regular basis, but I can't find
anything on an accepted method.

Thanks for your time...



In the military we always used flexible watertight conduit when making
the final connection from the final J-box to equipment that was subject
to vibration and other movements. So far as I know, if it installed
properly, it is legal wherever standard conduit is. I know from
experience that it will withstand much abuse (flooding, heat, cold,
constant vibration, and occasional earthquakes at the very least). It is
mighty expensive stuff and I don't think it would be rated for
underground usage but as the final link to the shed it would seem ideal.

--
John McGaw
[Knoxville, TN, USA]
http://johnmcgaw.com