Power company has underground going into line gutter. From there (without splices or taps)it goes directly into the line side of a 600A 3-p meter can . Load side of meter going into 600A disc. Contractor(not me)taps line side in 600A meter can and goes into the line side of a 3-P 200A meter can then the load side to a 200A disc. My question are you permitted to splice in the meter can, even though it is on the line side, and go to other equipment such as another meter can, transfer switch. I have no idea why no splice was made in the gutter.