Hi!!
The installers have run the wires as u can see in the following pic
View attachment 10865
The ground cables are running in a HDPE conduit so i guess it should not the bonded at both ends.
What about the DC cables?
BR and thank you
If you are asking if the grounded DC conductor (if there is one) should be bonded to the conduit (or any other part of the equipment grounding or grounding electrode systems) the answer is an emphatic NO. Doing that will defeat the ground fault detection function of the inverter.
Well...I am going to say answer "Smart $" question first then direct you to Section 690.43 for more reading.
The HDPE definitely does not need bonded... there'd be no [real] purpose.
Can't tell from the picture... are the metal conduits just sleeves for the concrete penetration, or do they run to the next enclosure? If the latter, underground or above?
You sound like my kind of engineer.This is thailand so we dont follow your 690.43 , there is a huge lack of standards here. Engineers where i work dont care about what installers do or if that is the best and safest solution. This is the first time i work with PV or any grounding/earthing system at the site and i do care about what is the best and why is the best no just because your NEC says so (Ex: there are many experts in this forum that do not agree with some NEC points regarding lighting protection ) so please rather help me with reasons than send me to the NEC (IF U LIKE OF COURSE).
From an NEC perspective, the metal conduit is not required to be bonded, assuming the HDPE conduit is continuous through each section... though debatable because NEC says short sections... I wouldn't consider 80m as short. Yet that is countered because (I assume) the majority is underground. The part that could be required to be bonded is any exposed portion where it emerges from under ground.They are sleeves, these IMCs go from the handhole right near the solar parking pv strings (no combiner box, direct string connection to inverter) to the handhole u see at the pic ( underground about 18m to cross the street).
From the handhole you see at the pic, the 16sqmm grounding cable goes underground to the earthing ring of the building by HDPE , the 8 strings cables to the inverter by EMC and the EGC to the inverter by a different EMC ( strings cables EMC and EGC EMC go attached to our building ceiling)
Thanks, i do really appreciate your help guys.
This is thailand so we dont follow your 690.43 there is a huge lack of standards here. Engineers where i work dont care about what installers do or if that is the best and safest solution. This is the first time i work with PV or any grounding/earthing system at the site and i do care about what is the best and why is the best no just because your NEC says so (Ex: there are many experts in this forum that do not agree with some NEC points regarding lighting protection ) so please rather help me with reasons than send me to the NEC (IF U LIKE OF COURSE).
EDIT: LANGUAGE