Materials around a generator you have sized, with the cable run measured, not guessed.
Electrical and plumbing. 5 questions answered below, each with the arithmetic behind it and the limits of what the tool decides. Open the Backup Power and Generator tool.
A backup power takeoff covers the equipment and the connections, not the sizing. Generator size follows from the load, the starting currents and whether the set has to run the whole building or a protected subset, and that is an electrical design question rather than a quantity. What the tool does is count the components a decided installation needs: the set itself, the changeover, the protection, the cable and the earthing, at the capacities you specify. Where a cable run has not been measured, it says so, because the run to a generator is often the longest cable on the site and the one most often priced from a guess.
A sixty kilovolt ampere set with a changeover rated for the same current, a distribution board for the protected circuits, and a cable run of twenty two metres from the set to the changeover. Two earth electrodes at the set and one at the building, with the conductor between them. A thousand litre tank, or two of five hundred if that is what the site can take, each on a bund with a fill point and a vent. The set and the changeover were specified before the tool was opened, which is the only order that produces a defensible installation.
No. Generator sizing follows from the connected load, the starting current of the largest motor, the diversity you expect and whether the set takes the whole building or a protected subset, and it is calculated by an electrical engineer rather than by a quantity tool. The tool takes a size you have decided and returns the equipment and connections that size requires, which is the part a supplier and an installer both need.
The set, the changeover, the protection, the cable by size, the earthing materials, the fuel storage and any containment for the runs. Each is counted from your specification and your measured routes rather than from a rule per kilowatt. That matters because two installations of the same capacity can differ by a hundred metres of cable depending on where the set sits and where it connects.
Because a generator is often the furthest thing from the board that it feeds, so its cable run is the longest on the site and the easiest to underestimate. A per metre allowance would be wrong in both directions, and the error lands on the most expensive cable in the building. Measuring the route and entering it keeps the order tied to the actual layout.
Fuel is not included as a cost. The tool counts storage capacity, which is a capital item, but consumption depends on the load profile and the set's specific consumption, and running cost depends on the fuel price where you are. Those are operating figures that belong in a different calculation from an installation takeoff.
No. Protection coordination, earthing design, changeover arrangements and the enclosure are all installation design, and the local wiring regulations govern them. The takeoff counts what the design calls for, so the installation can be priced and the materials ordered. Certification of the completed installation is a separate act by a competent person, and no quantity tool can stand in for it.