Final answer:
The sum of the cross-sectional area of the metal wires in a metal wireway in an elevator or wheelchair lift setup must not exceed the maximum load that the wires can support without breaking.
Step-by-step explanation:
In an elevator or wheelchair lift setup, the sum of the cross-sectional area of the metal wires in the metal wireway cannot exceed a certain value. This value is determined by the maximum load that the wires can support without breaking. To calculate this maximum load, you need to know the tensile strength of the wires, which is the maximum stress or force that the wires can withstand before breaking. This information is usually provided by the manufacturer or can be obtained through engineering specifications.