河北省廊坊市经济技术开发区华祥路 106
邮编：065001
No.106 Huaxiang Road, E&T Development Zone,Langfang 065001 P.R.China
4.7.7.
Grounding
Attach a ground conductor to two grounding bushing lug mounted at the designated location
shown in
Figure 8 (An Ilsco GBL-4DB is shown in the Figure)
. Use an Ilsco GBL-4DB
(Tin Plated) , and M5 stainless steel hardware (screw, lock washer, star washer, flat washer
and nut) as shown in
Figure 9
. The assembly must be torque to 6.1 Nm. The copper
conductor must be attached to the ground lug using the stainless steel set screw provided by
the lug manufacturer. The electrical wiring of the ground circuit should be such that the
negative leg of the array circuit shall have the same voltage as earth ground, and when
performing a DC voltage measurement between the positive leg of array circuit and earth
ground the meter shall read a positive DC voltage, or when performing a DC voltage
measurement between the negative leg of array circuit and earth ground the meter shall read
zero volts DC voltage. Please refer to NEC Article 690 on grounding PV arrays for specific
requirements.
Figure 8 – Ground Bushing Lug Locations
Ground Bushing Lug
Ground Bushing Lug
