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Wiley Electronics is the creator of the well known bonding washers WEEB. WEEB stands for "washer, electrical equipment bonding". WEEB products are used to bond solar modules to aluminum racking and mounting rails. The solar modules and the racking system are then grounded, grounding and interconnecting the entire assembly into one single grounding system. The use of WEEBs eliminates the need to use a lay-in lug and/or a thread-forming screw on each module. The use of WEEBs also eliminates the need to run a continuous wire to each module. Wire is only needed to connect a lay-in lug on each mounting rail to an equipment grounding terminal in the inverter or disconnect.
It has been continuously proven that WEEBs save installers time and money. WEEB products are ETL listed to UL standards. WEEB products meet the requirements of UL 467.
WEEB-UMC grounding clips are used between modules and Unirac SolarMount Standard Rails when front mount clips are used to hold the module to the rails. One clip grounds the frame of 2 adjoining modules to one of the mounting rails. Two clips are required for each pair of modules so that the modules will be bonded to both rails.
We advise speaking to your building inspector before installing WEEB products to see if they are acceptable in your area.