AC raceway in basement....
#1
12-02-13, 09:09 AM
AC raceway in basement....
Let me know if my preliminary ideas are sound.....
10/3 run to AC unit (30A breaker) in 1/2" EMT. Need to run out basment sill to an existing disconnect which has a knockout on the bottom. There is existing liquidtight between the disconnecte and the AC. Its about 100' from panel to outside on unfinished basement ceiling/joists. There is a 45' bend to the panel and another 45' bend to shoot out the basement in the area around the sill where the AC line set penetrates.
Instead of making bends with the emt, I was wondering if its OK to use flex metal for the 45 degree angles?
Before I need to go out basement sill I was thinking I need a junction box to connect the emt instead of the second 45 angle. There the emt would join with whatever material I should use to go outside with....
From there is liquidtight what I want to use to penetrate the house?
My mainconcern is that I wont be moving the disconnect so I am concerned how exact I would have to be with rigid metal coming out of the house.
Any thoughts.... thanks.
10/3 run to AC unit (30A breaker) in 1/2" EMT. Need to run out basment sill to an existing disconnect which has a knockout on the bottom. There is existing liquidtight between the disconnecte and the AC. Its about 100' from panel to outside on unfinished basement ceiling/joists. There is a 45' bend to the panel and another 45' bend to shoot out the basement in the area around the sill where the AC line set penetrates.
Instead of making bends with the emt, I was wondering if its OK to use flex metal for the 45 degree angles?
Before I need to go out basement sill I was thinking I need a junction box to connect the emt instead of the second 45 angle. There the emt would join with whatever material I should use to go outside with....
From there is liquidtight what I want to use to penetrate the house?
My mainconcern is that I wont be moving the disconnect so I am concerned how exact I would have to be with rigid metal coming out of the house.
Any thoughts.... thanks.
#2
12-02-13, 09:13 AM
Your unit may not require #10, check the minimum circuit ampacity on the nameplate.
AC units are straight 240 and only require 2 hots and a ground.
You should not need to run the cable in the conduit. If using conduit I would run individual conductors.
I would come into the back of the disconnect and just seal off the unused hole.
AC units are straight 240 and only require 2 hots and a ground.
You should not need to run the cable in the conduit. If using conduit I would run individual conductors.
I would come into the back of the disconnect and just seal off the unused hole.
#3
12-02-13, 10:07 AM
10/3 run to AC unit (30A breaker) in 1/2" EMT.
Its about 100' from panel to outside on unfinished basement ceiling/joists.
#4
12-02-13, 10:22 AM
10/3 individual conductors.
Can I use something flexible where it exits the house?
In order not to remove siding and the disconnect box I hoped to go out right next to the lineset and hopefully use liquidtight to into bottom of disconnect.
Can I use something flexible where it exits the house?
In order not to remove siding and the disconnect box I hoped to go out right next to the lineset and hopefully use liquidtight to into bottom of disconnect.
#5
12-02-13, 10:40 AM
10/3 individual conductors.
Can I use something flexible where it exits the house?
In order not to remove siding and the disconnect box I hoped to go out right next to the lineset and hopefully use liquidtight to into bottom of disconnect.
Can I use something flexible where it exits the house?
In order not to remove siding and the disconnect box I hoped to go out right next to the lineset and hopefully use liquidtight to into bottom of disconnect.
https://www.platt.com/platt-electric...spx?zpid=16223
#6
12-02-13, 05:19 PM
You mention flex isnt a good idea for the bends.
The one I am concerned about is the 90 going down from celing into my panel. Its a traffic jam and I fear I have no choice but to use flex.
Is it against practice to connect flexible metal conduit with emt to bring the raceway down to the panel?
The one I am concerned about is the 90 going down from celing into my panel. Its a traffic jam and I fear I have no choice but to use flex.
Is it against practice to connect flexible metal conduit with emt to bring the raceway down to the panel?
#7
12-02-13, 06:13 PM
With a proper fitting you can switch from EMT to flex.
Outside you can also use non-metallic liquid-tite conduit also. You just need to install a grounding conductor inside it.
Outside you can also use non-metallic liquid-tite conduit also. You just need to install a grounding conductor inside it.
#8
12-02-13, 07:46 PM
Is it against practice to connect flexible metal conduit with emt to bring the raceway down to the panel?
#10
12-03-13, 04:25 PM
Member
Go to Home Depot and buy a 1/2'' bender for $50, make your bends, sell like new bender to an electrical apprentice on kijiji for $40.
You mention a traffic jam, but the beauty of pipe is it can be manipulated to fit wherever you need it to. Investigate different bending techniques and see how you feel about it. As a 2nd year, I personally think it feels great to look at some sexy pipework you just finished after getting frustrated and swearing at the crappy space you're working with.
You mention a traffic jam, but the beauty of pipe is it can be manipulated to fit wherever you need it to. Investigate different bending techniques and see how you feel about it. As a 2nd year, I personally think it feels great to look at some sexy pipework you just finished after getting frustrated and swearing at the crappy space you're working with.
#11
12-03-13, 07:14 PM
Go to Home Depot and buy a 1/2'' bender for $50
Klein Tools 1/2 in. Aluminum Conduit Bender and Handle-56206 at The Home Depot
I was thinking more like $15 so I was wrong all the way around. Greenlee and Ideal benders are only about a buck cheaper.
#12
12-04-13, 12:58 PM
I really like my Gardner Bender foot benders with the built-in levels for 45[SUP]o[/SUP] and 90[SUP]o[/SUP]. I bought them to keep, of course, but I noticed that I can pick up a new 1/2" one for less than $25.
Gardner Bender 930B 1/2-Inch EMT Gardner Thinwall Aluminum Hand Bender at Amazon.com
Gardner Bender 930B 1/2-Inch EMT Gardner Thinwall Aluminum Hand Bender at Amazon.com
Last edited by Nashkat1; 12-04-13 at 02:07 PM.
#13
12-04-13, 02:17 PM
The Gardner Bender EMT benders are what I was thinking off, but they don't come with a handle. Add the handles and you are back in the $30 range. I guess everything is just more expensive than I remember.
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