Voltage Drop Limits — Multi-Standard Comparison Poster
Free download · A3 landscape (420 × 297mm)
Voltage drop allowances vary significantly between standards, and getting them wrong means undersized cables or wasted copper. This A3 landscape poster presents voltage drop limits side-by-side across all four major standards: NEC (3% branch / 5% total), IEC 60364-5-52 (4% recommended), AS/NZS 3008 (5% default), and BS 7671 (3% lighting + 5% total). A central worked example shows the voltage drop calculation step-by-step, and a measurement origin rules panel clarifies where each standard measures from (origin of installation vs point of supply). Pin this in your design office to prevent the most common cable sizing error.
What's Included
How to Print
- ●Print on A3 (297 × 420mm) or tabloid (11 × 17")
- ●Color printing required for comparison highlights
- ●Use a professional print shop for best results
- ●Frame or laminate for long-term office display
Try the Interactive Calculator
Need precise calculations beyond quick reference? Try our free online calculator with full clause references and professional report output.
Open CalculatorRelated Downloads
VD Limits Cheatsheet
Free printable voltage drop limits cheatsheet comparing NEC (3%), IEC (4%), AS/NZS (5%), and BS 7671 (3%+5%) side by side. Includes measurement origin rules and voltage drop formula.
Cable Ratings Poster
Free printable A3 wall poster comparing cable current ratings across AS/NZS 3008, BS 7671, IEC 60364, and NEC side-by-side. Pin in your design office.
Install Methods Poster
Free printable A3 cable installation methods poster. 12 installation reference methods with letter codes across AS/NZS 3008, BS 7671, IEC 60364, and NEC. Visual icons and cross-reference mapping.
Frequently Asked Questions
What paper should I print this on?
Print on A3 paper in color (minimum 100gsm). Laminate or use a poster frame for office display. Matte finish reduces glare.
Can I distribute this to my team?
Yes. Print copies for every design workstation. All ECalPro posters are free to print and distribute within your organization.
What standard does this reference?
Covers voltage drop requirements from NEC 210.19(A) Informational Note, IEC 60364-5-52 Annex G, AS/NZS 3008.1.1:2017 Clause 4, and BS 7671:2018+A2 Appendix 12.
How often is this updated?
Updated when voltage drop requirements change in any of the four standards. Current poster reflects the latest editions.