Grounding lugs and clips rank among the most important parts of photovoltaic systems. This article briefly shows how to figure out the number of clips and lugs needed during installations.
Grounding Clips (WEEB - PMC, UMC, SMC)
Order one grounding clip for every two top mounting clamps (mid + end clamps).
Basically, the grounding clips are used to ground each module with the rail. You don't need clips for every clamp. Please refer to the image below. The red cross marks the location of the grounding clips.
Click to download the installation manual in .pdf version.
Grounding Lugs (WEEBL 6.7, WEEBL 8.0)
Order one grounding lug for each span of rail and two for each rail splice. Mainly, you would need one grounding lug for each rail span. However, you have to bond the rail segments that are connected with a splice. For each splice you would either buy one bonding jumper or two grounding lugs. Please refer to the image below. (The red cross marks the location of the grounding lugs.)