How to wire lighting fixture with two sets of hot, neutral, and ground? Leave a comment

I’m installing a light fixture in my crawl space. The fixture has a set of hot, neutral, and ground wires coming into the fixture from utilities as well as a set of hot, neutral, and ground wires coming into the fixture from our radon system (see image below).

Original light fixture wiring

The hot and neutral wires had pigtails connecting them together for the radon system to operate. The radon system was installed as part of our purchase for the home, so this is the first time I’m looking at this light fixture. Would it be OK to tighten both wires of the same type (hot, neutral, ground) under the relevant screws of the light fixture? I’ve started to connect the light fixture with one wire of each, as shown below.

Latest light fixture wiring

If both wires under each screw is not OK, would I need to cut a wire section in order to pigtail three ends of each wire type together, like in the image from this blog?

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