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This post was last edited by zhaohh3211 on 2010-8-18 at 14:21. The company wants to build a dormitory building; they have obtained some blueprints and are looking for someone to prepare a budget. The boss asked me to check if there are any major issues in the electrical budget. When I got the blueprints, I was completely lost! I’ve been struggling for half a month; I don’t know how to figure out the remaining wires, so I’m here for help. The person in charge of budgeting said that the length of the wire tube should be measured according to the positions indicated in the legend, along with the vertical height, and then the total length of the wire should be calculated. But someone told me that I just need to take the length of the thick line in the diagram that indicates the direction of the wire and add the vertical height! Which one is correct after all? Everyone, **please help!**
For example, a circuit is drawn from the distribution box on the first floor to a light on the second floor. First, measure the straight-line distance according to the scale on the drawing, and then add the vertical distance. This gives the ideal distance between the pipes as shown in the drawings. Next, taking into account the conditions at the site, determining where to turn and where to pass through walls, the losses need to be taken into account. In this way, the actual length of the pipe is determined. When calculating the length of the wire, use the actual length of the pipe plus the loss length (usually 10%-15%) plus the extra length at both ends (usually 30cm-50cm for lighting purposes). I hope this can help you. I suggest the original poster take a look at books on project cost calculation, as they provide very detailed explanations.