New to Solar. Help with 3 Line Diagram/ Wiring Diagram

[Naptown]

OK a couple of things wrong on that drawing
It appears there are three strings of collectors in the array. This will require a fused combiner.
Second sizes of conductors are not specified.
No bonding is indicated.
No specification on the size or ratings on the buss bars of the panel.
Input location for the breaker from the inverter is in the wrong position. Should be at opposite end of panel from main utility breaker.[ATTACH]2020[/ATTACH]

my apologies, this is a bit of a necro post. i am a new user and im going against the admins and mods if they continue to disagree with sound observations of other users like inetdog, then i suggest not paying any attention to thier (naptown/mike)'s opinion/advice in the future

naptown, mike, you guys are both WRONG. the OP posted a diagram of ONE string (three or more panels/modules connected in SERIES) no combiner needed because there are no PARALLEL connections.

also see NEC article 690.9 (A) exception. This means he needs no OCPD on the pv source circuit. (correct me if im wrong)

*you wouldnt quote the bible without reference to the verse. so why do you try it with the NEC?*

Read what I wrote in red. then read the rest of the thread. My statement was that it appears there are three strings. There are so many other things wrong with that it was hard to say what was intended or there. The OP never corrected me on the number of strings. If indeed there is only one string then you are correct there is no OCPD needed. Even with two strings no OCPD is needed.
I seriously hope you never misread a post or imply a question that goes unanswered.

[russ]

apologies russ, was only reflecting mikes demeanor. good morning

Hi Slayer - Welcome to Solar Panel Talk!

Looking forward to your participation!

Russ

[slayercuzz]

Being the standard atheist I would never quote that book anyway.

Your first post shows a wise ass with no finesse at all - caution or you won't post a third time.

Corrections are welcome and fine but your know it all attitude pissed me off this morning.

apologies russ, was only reflecting mikes demeanor. good morning

[russ]

*you wouldnt quote the bible without reference to the verse. so why do you try it with the NEC?*

Being the standard atheist I would never quote that book anyway.

Your first post shows a wise ass with no finesse at all - caution or you won't post a third time.

Corrections are welcome and fine but your know it all attitude pissed me off this morning.

[slayercuzz]

i agree with i net dog

Are we looking at the same diagram as the photo in the post? I see one series string of more than three panels, all with a common protective ground.

my apologies, this is a bit of a necro post. i am a new user and im going against the admins and mods if they continue to disagree with sound observations of other users like inetdog, then i suggest not paying any attention to thier (naptown/mike)'s opinion/advice in the future

naptown, mike, you guys are both WRONG. the OP posted a diagram of ONE string (three or more panels/modules connected in SERIES) no combiner needed because there are no PARALLEL connections.

also see NEC article 690.9 (A) exception. This means he needs no OCPD on the pv source circuit. (correct me if im wrong)

*you wouldnt quote the bible without reference to the verse. so why do you try it with the NEC?*

[russ]

i use autocad. once you get used to it it's pretty easy. plus, editing / tailor fitting for other projects is very easy once a similar diagram is already made.

Autocad is very expensive - you might try Draftsight - a free program that is very similar

[hustin]

"It appears there are three strings of collectors in the array. This will require a fused combiner."

My boss said that a combiner is not necessary because the voltage wasn't that high.

He did say that the rest of the information was good to know. So thanks.

I still haven't got the answer as to what is the best computer software to make these diagrams.
Once again, thanks for all the help.

i use autocad. once you get used to it it's pretty easy. plus, editing / tailor fitting for other projects is very easy once a similar diagram is already made.

[aymana33]

thx

thx

[JarodGreenTipi]

Great community

Anyone know of aggregate solar installer liability insurance purchasing opportunities? Electricians only have to pay around $300/yr thanks to their union. Why don't we have something similar?

[Naptown]

My drawings are done in Softplan. Architectural software but I had it, it works OK have to do some work arounds.

[Mike90250]

For drawing, I used visio

Google sketch is supposed to be ok too

[Mike90250]

Fuses are not for voltage, they control (stop) excess amps. 2 strings need no fuse, 3 need it, 1 device on each string. 2 strings can fry a damaged 3rd string.
Tell your boss to get over it, and learn.

Or get rejected again.

[Apollos Harness]

"It appears there are three strings of collectors in the array. This will require a fused combiner."

My boss said that a combiner is not necessary because the voltage wasn't that high.

He did say that the rest of the information was good to know. So thanks.

I still haven't got the answer as to what is the best computer software to make these diagrams.
Once again, thanks for all the help.

[inetdog]

No what I posted is an example.
What the AHJ's seem to look for are
String voltage calculations.
Max amperage on wires from combiner to inverter.
Wire sizes per NEC
Bonding

In the post Quoted, are you referring to the drawing in the attachment? My attachment is an example not the corrected one for the OP.

And while we are on the subject these are called one line drawings not 3 line drawings.

When I look at the original post, I see a text reference to a "three line drawing" and directly under it is what appears to be an illustration from a manual. The only link I can find in the post is the one to your example one line drawing with tables and all the good stuff. Interestingly, the way I found that was by trying to copy the URL associated with the illustration! Either somebody has edited the original poster's link out of the message, or I just can't find it.

Strange, isn't it?

[Naptown]

Are we looking at the same diagram as the photo in the post? I see one series string of more than three panels, all with a common protective ground.

No what I posted is an example.
What the AHJ's seem to look for are
String voltage calculations.
Max amperage on wires from combiner to inverter.
Wire sizes per NEC
Bonding

In the post Quoted, are you referring to the drawing in the attachment? My attachment is an example not the corrected one for the OP.

And while we are on the subject these are called one line drawings not 3 line drawings.