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Old 07-20-2019, 08:29 PM   #31
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


If you run individual conductors it must be in conduit the whole run.

Adding up the breaker handles I'd meaningless.

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Old 07-20-2019, 08:48 PM   #32
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


If you run in conduit you only need one ground, not three.
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Old 07-20-2019, 09:45 PM   #33
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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If you run individual conductors it must be in conduit the whole run.
currently

Thank you, I didn't know that but was planning to run in conduit just because it seemed safer however

I was planning to run in conduit from the unit through a plywood false, 2nd, wall that the unit is mounted on, wire up the inside of that wall using cable ties to keep it together, then in to existing 1 1/4" PVC piping at the top which currently exits not in conduit, current is Romex cable stapled to the floor joists. I can put it in 1" electrical conduit, would pvc be ok? Then how close to the panel can I stop? At the top? Do I have to run it in to the box using one of those threaded conduit with the electrical nut lock?
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Old 07-20-2019, 10:16 PM   #34
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


The conduit must be continuous and connect both to the electrical panel and the water heater. Running cable would be easier.

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Old 07-21-2019, 06:51 AM   #35
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


I wonder will this WH be within the 50 ft. "line of sight" disconnect rule, from the breaker box it is being powered from ?
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Old 07-21-2019, 07:59 AM   #36
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


Since you told us in post #30 that the house has gas run to it, someone should really evaluate why this energy suction machine is even here. And do you really want to put another dollar into it!


I can't imagine the gas rates are extraordinary high in NJ.


At this point you are about to spend enough on re-wiring and conduit to nearly cover the cost of a NG tank.
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Old 07-21-2019, 08:18 AM   #37
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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Originally Posted by rjniles View Post
The conduit must be continuous and connect both to the electrical panel and the water heater. Running cable would be easier
Can I buy 8/2 without a ground?

I was thinking running 3 - 8/2 without a ground, using both 2s as a hot, tagged, then the 4th using 8/3 so the ground would be connected.
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Old 07-21-2019, 08:21 AM   #38
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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Originally Posted by Gregsoldtruck79 View Post
I wonder will this WH be within the 50 ft. "line of sight" disconnect rule, from the breaker box it is being powered from ?
The basement has been finished, there are walls in the way now, and corners to turn.
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Old 07-21-2019, 08:31 AM   #39
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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Since you told us in post #30 that the house has gas run to it, someone should really evaluate why this energy suction machine is even here. And do you really want to put another dollar into it!

I can't imagine the gas rates are extraordinary high in NJ.

At this point you are about to spend enough on re-wiring and conduit to nearly cover the cost of a NG tank.
Gas is cheap here because of gas distribution pipes coming across the country. The house is actually across the river in PA and burn has and electricity are even cheaper.

I was not part of the choice of but water heaters. She previously had a regular hot water heater and choose a tankless. I was shocked when I saw an electric when she had a gas pipe a few feet away, maybe 7'-10', in the ceiling. Now the ceiling is finished with sheetrock but it is a dropped sheetrock ceiling. I can see the pipe on a step ladder from the under steps closet I'm sheetrocking where the electric tankless hot water heater is located.

I set her an email about throwing the money in to a gas tankless heater. She's in Maine for the summer.
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Old 07-21-2019, 10:11 AM   #40
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Sounds like it is indeed connected correctly in the heater minus wrong wire size, just that the white wire needs to be moved from the neutral bar onto the other pole of a 2 pole breaker instead of a single pole breaker. What size service does she have? Having 1 circuit not in the same panel sounds like a problem in the service being adequate.
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Old 07-21-2019, 10:17 AM   #41
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Remember that a gas tankless heater requires a larger than normal gas line compared to a conventional heater.
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Old 07-21-2019, 10:50 AM   #42
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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Originally Posted by JLawrence08648 View Post
Can I buy 8/2 without a ground?



I was thinking running 3 - 8/2 without a ground, using both 2s as a hot, tagged, then the 4th using 8/3 so the ground would be connected.
No you will not find 8-2 without ground. Just run 8-2 (with ground) and tie all the grounds together.

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Old 07-21-2019, 11:29 AM   #43
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


Someone correct me if I am wrong here, but I am so far seeing these issues with the OP's WH project.

1. Needs all new # 8 service conductors. Doable...

2. Is currently fed from TWO different breaker boxes. Not good ...

3. Is a electricity hog. Not good....

4. The breaker box is not in sight of the WH, so there will be no legal means of disconnect at the WH for servicing. Not good....

5. Has it been confirmed the service to this dwelling is safe to handle this WH ?


IMO, unless Sis is housing 6-9 people she could probably get by with a standard gas 50 gallon WH. If she does have a lot of people steadily in the homes showering, she would probably do well with a 75 gallon WH like in the link.

But I can certainly see why no one likes dumping probably a $1500 (???) WH, they already have paid for just to buy another WH and have to pay to get installed. But the ROI even after 10 -12 years may be worth it. No utility prices are going to go down, gas or electric. . JMO

https://www.hotwater.com/Water-Heate...ater-GPVX-75L/
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Old 07-21-2019, 12:25 PM   #44
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


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Originally Posted by Wiredindallas View Post
Remember that a gas tankless heater requires a larger than normal gas line compared to a conventional heater.
No I did not know that. Another problem maybe to deal with. I'll just tell her to move. Looking at the pipes inside the ceiling, I think it may be large enough as I noticed it had a line that was reduced going to the gas stove.

What size will I need?
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Old 07-21-2019, 12:59 PM   #45
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Re: Electric Tankless Hot Water Heater 30amp instead 40amp breakers


Quote:
Originally Posted by Gregsoldtruck79 View Post
Someone correct me if I am wrong here, but I am so far seeing these issues with the OP's WH project.

1. Needs all new # 8 service conductors. Doable...

OP - Agree, initial reason for posting, Thanks everyone!

2. Is currently fed from TWO different breaker boxes. Not good ...

OP - I don't like that idea either but why not?

3. Is a electricity hog. Not good....

OP - She was complaining about her electric bill. I was going tho ask her what it was before the tankless. She had a large electric regular tank heater. I'm thinking about maybe owning a solar system might be the way to go for her.

4. The breaker box is not in sight of the WH, so there will be no legal means of disconnect at the WH for servicing. Not good....

OP - ??? Legal means of disconnecting the water heater for servicing?? Legality? Just walk 35' open the door to the panel. Why does it need to be in sight?

5. Has it been confirmed the service to this dwelling is safe to handle this WH? is

OP - It's been there for almost 2 years without a problem.


IMO, unless Sis is housing 6-9 people she could probably get by with a standard gas 50 gallon WH. If she does have a lot of people steadily in the homes showering, she would probably do well with a 75 gallon WH like in the link.

But I can certainly see why no one likes dumping probably a $1500 (???) WH, they already have paid for just to buy another WH and have to pay to get installed. But the ROI even after 10 -12 years may be worth it. No utility prices are going to go down, gas or electric. . JMO
See my replies above after OP
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