Grounding question?

[yukon]

Is it a must that I ground my lines coming into my home. I have two lines coming in to two of my boxes running through a little ground block. But the last line i brought in I didn't ground.. I just tied it in. Can this cause trouble. Have the three receivers and just didn't ground the last receiver i added cause my little block was full. Also just added a dpp44 switch and noticed some little grounding slots on this.. anything to it???

thanks

 

[SimpleSimon]

YES it's absolutely required to ground ALL incoming lines.

You mention grounding "slots" on the DPP44. I don't understand that. Grounding LUGS makes sense. If the switch has that, it can be used in place of a grounding block - just run a ground wire to the lug.