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Before you can calculate the load bearing capacity of a scaffold, you will need to know there are three types of scaffolding; light duty, medium duty, and heavy duty. Now you can calculate the load bearing capacity by using the height to base ratio.
The current-carrying capacity of a cable depends on a number of things in addition to its cross-sectional area; these include the type of conductor, number of cores, type of insulation, whether or not it is armoured, method of installation, etc. Accordingly, to determine its current-carrying capacity, you will need to refer to your national electrical code. For example, in the UK, BS 7671:2008 Requirements for Electrical Installations contains tables for all standard cable types, specifying current-carrying capacity, voltage drops, etc.
Steel Cannot be calculated based on cft. Load bearing capacity is required to calculate steel.
1 sq..mm have max. capacity is 10 ampere if these are of copper approximately than 120 sq..mm having current carrying capacity is 1200 ampere