Hi Reader I am just letting you know. I have added short-circuit I²t let-through energy to MCBs in the Cable Size Calculator. This checks the cable’s short-circuit rating against the MCB’s let-through energy. The calculator uses typical let-through energy values based on Schneider iC60 and C120 current-limiting MCBs. Reputable current-limiting MCBs in Australia have similar values. You can also enter custom values. The calculator uses the MCB fault rating to determine the typical let-through...
about 2 months ago • 1 min read
Hi Reader Just letting you know. I have updated the Voltage Rise Calculator. I added the following: Aluminium cables. Parallel cables. Larger cables up to 630 mm² Please let me know if you have any questions or suggestions. Click to try. Adam van StadenLinkedIn Profile 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...
3 months ago • 1 min read
Hi Reader Just letting you know. I have updated the Voltage Rise Calculator to the 2025 version of AS/NZS 3008 (Australian conditions). Please let me know if you have any questions or suggestions. Click to try. Adam van StadenLinkedIn Profile 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...
4 months ago • 1 min read
Hi Reader I am just letting you know. I have added the 2025 version of AS/NZS 3008 to the Cable Size Calculator. This version applies to Australian conditions only. You can still use the 2017 version. Note that Standards New Zealand has not yet published the 2025 version of the New Zealand standard. Summary of 2025 changes applicable to the Cable Size Calculator New table numbers. Dedicated current ratings for DC circuits. Combined current ratings for flexible and non-flexible copper...
4 months ago • 1 min read
Hi Reader Just letting you know. I added an Export Limit to the Voltage Rise Calculator. Let me know what you think. Click to try. Adam van StadenLinkedIn Profile 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...
12 months ago • 1 min read
Hi Reader Just letting you know. I added a new Voltage Rise Calculator for solar installations. Let me know what you think. Click to try. Adam van StadenLinkedIn Profile 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...
about 1 year ago • 1 min read
Hi Reader I am just letting you know. I added two options to optimise the earth cable sizing for high current installations in the Cable Size Calculator. Option: Ignore table 5.1 sizes Ignore earth sizes specified in Table 5.1 in AS/NZS 3000. Earth size will be based on fault current and loop impedance only. This option is available when: Parallel single-core cable groups are used. Check fault rating and Check loop impedance are enabled. The calculated earth size is ≥ 120 mm2 (copper) or ≥...
about 1 year ago • 1 min read
Hi Reader Just letting you know. Paid users can now add a custom disclaimer to their PDF reports. Step 1: Tick the box to "Add your own disclaimer" Step 2: Enter your disclaimer. Step 3: Generate a PDF report with your disclaimer in the footer. Click to try. Please let me know if you have any questions or suggestions. Adam van StadenLinkedIn Profile This information does not constitute legal, professional or commercial advice. JCalc Pty Ltd gives no guarantees, undertakings or warranties in...
over 1 year ago • 1 min read
Hi Reader Just letting you know. I have changed the mobile layout of the Maximum Demand Calculator. See the images below. I also made a few improvements and fixed some defects. Improvements I added kW ratings. You now have A, Watt and kW. I added 3-phase loads to Blocks of Living Units. I improved the descriptions for the default loads when you open the calculator the first time. I updated the example in the content below the calculator with more load groups and more detailed calculation...
over 1 year ago • 1 min read