We are upgrading our service to 200A and have several choices for how
to clad the mains supply run from the aerial drop down the side of the
house (about 20 feet).
1. Use flexible cable with tough plastic surface
2. Place wire in PVC conduit
3. Place wire in metal conduit
What are your recommendations taking into account?
a] Paintability, neatness, and overall look
b] Durability and minimal need for maintanance
c] Relative cost
Local codes prevail in all cases. Here GRC or IMC is required for the mast.
If you are in the south pvc will not last very long 4-10 years even when
PVC even the sunlight resistant type will not last for a long time exposed
to the sun.
Seal-tite same answer
GRC most expensive
IMC next, neither will ever need maintenance unless there is physical
Seal-tite next, subject to physical damage
PVC cheapest lest protective.
See first statement. LOCAL code prevails. I would use IMC and
This is *very* helpful -- I hadn't realized that PVC was so unstable
Would you recommend against it even in the Northeast (Massachusetts)?
I mean if you only get 4-10 years in the South, how much longer can
you get in the North? While we may get less heat, we still have plenty
of sunlight and I can't imagine that the freeze/heat cycling is so
good either? Right???
Now what diameter conduit would I typically need for 200A service?
I want to use the smallest diameter possible and would be willing to
even go copper over aluminum if it allowed me to use a narrower
Are there some good rules of thumb here for conduit diamter
vs. Amperage for Aluminum and for Copper?
email@example.com (Jeffrey J. Kosowsky) wrote:
That is what is used here outside of Chicago, due to codes.
Good reasons, unless you want to maintain or repair it in the future.
Given that the main feed, before your main fuse/breaker, is limited only
by the protection on the pole transformer, having the maximum protection
seems to me a really good idea.
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