Hi Reader

I am just letting you know.

I made a few small improvements and fixed defects on the Cable Size Calculator.

Improvements

• I added a confirmation window for the reset button.
• I added a warning for the user to raise the ambient temperature for cables installed in ceilings.
• I added step-by-step calculations for the phase and earth fault at load.
• I improved the step-by-step calculations for maximum earth loop distance.
• I added new content to explain maximum loop distance calculations.
• I added new content to explain the MCB curve types.

Defects

• Parallel cables are now allowed for cables ≥ 4 mm² only –AS/NZS 3000, section 3.4.3.
• I added reactance correction factors for "Spaced" single-core cables –AS/NZS 3008, Tables 30 and 31, Note 1.
• I changed single-phase reactance values from "Flat" to "Trefoil" –AS/NZS 3008, Tables 30 and 31. The "Flat" values were more conservative".
• Cables installed horizontally on a wall with a vertical spacing of 6D (no derating) are now limited to 3 cables –AS/NZS 3000, Figure 1, Note 5.

Examples of the improvements

Reset confirmation window

Impedance correction factors for "Spaced" single core cables.

Warning to raise ambient temperature for cables installed in ceilings.

New step-by-step calculations for phase and earth fault at load

Improved step-by-step calculations for maximum earth loop distance.

Click here to try.

Please let me know if you have any questions or suggestions.

I appreciate your feedback.

Adam van Staden
​LinkedIn Profile​
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This information does not constitute legal, professional or commercial advice. JCalc Pty Ltd gives no guarantees, undertakings or warranties in this regard, and does not accept any legal liability or responsibility for the content or the accuracy of the information so provided, or, for any loss or damage caused arising directly or indirectly in connection with reliance on the use of such information.