Specifications for PA ground and PE ground
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Everyone must have a wealth of experience from various field sites, right? But now, in terms of instrumentation and electrical systems, I believe there are some minor differences among many factories. And what exactly is the acceptable value for ground resistance according to national standards? And are the grounding piles for PE and PA the same grounding pile? I hope everyone will share their thoughts
The general ground resistance should not exceed 4 ohms, and it is all connected to a single grounding post.
For general instruments, the required ground resistance is typically below 10 ohms; this value depends on the actual conditions at the site, but most owners require it to be below 4 ohms. The grounding of electrical instruments is done separately, but it ultimately converges at one grounding plate
Generally, 4 ohms is required; the electrical and instrumentation systems should be separated, with a single common ground at the end.
They are separate, but of course they’re together in the end!