How to calculate the quantity of work for instrument cable terminations
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Are there any relevant specifications that specify how the cost of manufacturing cable terminations for instrument signal cables, control cables, and power cables is determined, or whether such costs can be waived? The cables for the instruments are all thin, but there are a large number of them; if costs are calculated based on the standard rates for electrical cable connectors, the expense will be very high.
There’s no need for something so complicated; everything can be included in the installation cost, which is negotiated between the installation company and the firm. The installation includes functions such as circuit testing; how can it be debugged without connecting wires?
Hello, when preparing tender documents, I include the cable terminations in the description of the cable installation work, without charging a separate fee for them. However, the original tender documents and contract for this project did not include the fabrication and installation of cable terminals as a separate item. Now, when the construction contractor submits the quantity estimates, there is a cost for cable terminal fabrication as well. I was just thinking about how to reduce the costs.
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First, you need to take a look at how your construction and installation contract with the contractor was signed – whether it is a fixed-price contract or one based on specific rates. If it is a fixed-price contract, you don’t need to worry about the aspects within the scope of construction. If there are any changes or additions, you need to check which rate scheme is specified in the fixed-price contract; this rate scheme may be modified (using the method of unbalanced pricing), resulting in different prices. However, the cost of manufacturing instrument cable connectors is included in the work related to wiring the panels, meaning that wiring the panels encompasses tasks such as attaching wire connectors, printing labels, testing the wires, assigning numbers to them, crimping or welding terminal connections, wiring, and bundling the wires. Therefore, a separate fee is generally not charged, and it’s also not possible to use the electrical industry standards for pricing. As a professional engineer on the client’s side, it’s essential to carefully review the contract terms and be familiar with these standards in order to prevent the construction party from taking advantage of the situation
Thank you; you’re right. It’s best to specify everything in advance in the tender documents, as that will avoid problems down the road. The worry is that if nothing is clearly stated in the tender documents, disputes may arise when calculating the volume of work later on.