Electribidder I have designed, built, commissioned, and tested 48 VDC power plants for telephone companies for about 27 years off and on.
Let me tell you if you have never done this before, you are in way over your head. For example the wax string you are referring too takes a lot of time and skill to do right. Have you ever heard of a power stitch, Chicago stitch, or Kansas City Stitch. These are special types of stitching used to secure the cables to the racks and break-overs. To do it right requires a 12-ply cord. For power it is done in a 4-tie (4 cords) and there can be no twist, the 4 cords neatly side by side. Takes a lot of experienced skill to do it right. On horizontal runs the cable are secured to every other cable rung in the cable rack using a Kansas City stitch with one continuous 4-cord, on vertical and corners every rung is secured.
Tools and terminals are another issue and very specialized. Most are made by Burndy and T&B using hydraulic tools with custom dies for each type of cable size and terminal type. It is very detailed oriented work like no more than 1/16-inch shinner visible at the end where the cable enters the terminal, and no more than 1/16 from the inspection window. Die codes must be visible for inspection and oriented properly on the terminal.
On the lines of the cable itself is quite specialized. It is usually a RHH-RHW-2-LS with a cloth covering. It is laid on the rack in matched pairs with it's opposite polarity counter part (+/-). IT is done very neatly, no just slopping the cables on the rack and run. When done correctly and laced it looks like a perfect block of stacked barrels in which you can put your finger on a cable and run it along the entire length without ever having to lift your finger off of it. Couple that with the lacing and stacking 750 MCM up to 7 layers, I think you get the picture of the labor, time and skill involved.
To answer your question yes there are lots of industry standards that are not available to the general public. They can be purchased from Telcordia or ANSI. The Telcordia documents are GR-295 and GR-513. However these documents cover the design aspect, not the installation aspect. Installation standards are company dependant and/or a learned skill.
I am not trying to scare you off, but if you won the bid, and did not meet expectations you could be in for 10's or 100's of thousands of dollars in re-work or hiring someone with the skill to correct the work.