AMPLIFY VOLT/SCCR Calculator

Calculate voltage drop and size conductors — Canadian Electrical Code 2024

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Auto Cable & Conduit

Minimum cable auto-selected for ampacity + VD budget. Conduit sized by fill calculations.

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Node-Based Topology

Define nodes in the Node Manager, then pick any route in the Calculator tab.

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Full CEC Checks

VD, ampacity, SCCR, bonding (Rule 10-616), GEC (Rule 10-114) all auto-calculated.

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Node Manager
Define all nodes (transformer, panels, disconnects). Configure system settings below, then go to Segment Analysis to wire them up.
💡 Tip: Click a node name to rename it. The + button instantly adds a segment in the Segment Analysis tab. The first node (⚡ Source) is the transformer.
⚡ System Configuration
Phase · Voltage · VD Limits · Cable Rules · Transformer — applies to all segments
≥60A feeder → AL  |  <60A / small size → CU
Auto: optimizer picks cable & sets  |  Manual: you pick, calcs still validate
🎯 VD Design Targets
Flat: your design target applies equally to all feeder/panel/meter-stack nodes. Recommended for most projects.
Warn threshold  |  CEC max 3.0%
Hard fail — CEC Rule 8-102
Load endpoints — CEC max 5.0%
🔧 Practical Cable Limits — Auto-Solve Parallel Logic
⚡ Auto-solve will prefer parallel sets over exceeding these per-set limits.  e.g. 400A in raceway → 2×350 MCM AL instead of 1×1000 MCM AL.
Indoor pulls, tight bends
Duct bank pulling
Pulling machines available
No bending constraints
CEC Table 36 AAC sizes
🏭 Source Configuration (for SCCR)
Utility transformer — ISC from kVA and Z% impedance
⚡ Utility Transformer
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Short Circuit Calculation (Bussmann P2P Method)
f factor → M factor → ISC at each node — CEC Rule 14-012
OFF ON
One-Line Diagram Preview
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Segment Analysis
Cable & conduit auto-sized. ISC/VD calculated per segment.
📊 Results & Reports
VD · SCCR · Ampacity · Bonding · GEC · Feeder Notes
Feeder VD — Rule 8-102
0.00%
—Limit 3%
Total VD (Source → Load) — Rule 8-102
0.00%
—Limit 5%
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Voltage Drop Results
CEC Rule 8-102 — 3% feeder / 5% total
#SegmentFrom → ToLength (ft)Conductor SetsCurrent/SetK (CEC)Area mm²CMSeg VD (V)Seg VD% Cum VD%End VoltageStatus
Formula — CEC Table D5 Circular Mil Method (CSA C22.1 Appendix D)VD = (K × P × L × I) / CM  |  K = CEC resistivity constant (60°C: Cu=11.7 Al=19.6 | 75°C: Cu=12.3 Al=20.6 | 90°C: Cu=12.8 Al=21.6)  |  P = 2 (1φ) or 1.732 (3φ)  |  L = one-way length (ft)  |  CM = Table D5 area (mm²) × 1973.5
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Fault Current (SCCR)
Bussmann P2P Method — CEC Rule 14-012
#SegmentLengthC-ValueSets ISC In (A)f FactorM FactorISC Out (A) AIC RatingAIC Status
Bussmann P2Pf = (1.732 × L × ISC_in) / (C × n × V)  |  M = 1/(1+f)  |  ISC_out = ISC_in × M
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Cable Selection Validation (CEC Tables 2/4/D11A/D11B)
Derated ampacity ≥ load current per set
#SegmentConductorTable Base (A)DeratingDerated (A) Load (A)Status
Underground (D11A/D11B): 90°C base ×0.886 for 75°C terminations. Raceway/Free Air: Table 5A ambient derating applied.
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Bonding & Grounding Conductor Requirements
CEC Table 16 / Rule 10-616 and Rule 10-114
⚡ Bonding Conductor Sizing (CEC Table 16 / Rule 10-616)
#SegmentCircuit Ampacity Cu BondingAl BondingCEC Rule
🏠 Grounding Electrode Conductor (CEC Rule 10-114)
Per CEC Rule 10-114(1): Minimum #6 AWG copper or #4 AWG aluminum for services up to 200A.
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CEC Rule 8-102 Compliance — Node Status
Cumulative VD from Transformer to each node. Feeder 3% vs Branch/Load 5%
NodeTypeCumulative VD%Targets ▶Design ⚠Warn ✗FailStatusRule
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Feeder Notes for Drawings
Auto-generated — copy directly into drawing callouts
Toggle note content ↑
Format: [Amps] [Sets]-[Size] [Material] C/W [Ground] [Material] GRND IN [Conduit] OR EQUAL  [VD%]
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Engineering Reference Only. Verify with a Professional Engineer or Master Electrician. CEC CSA C22.1:2024. Bussmann P2P per Eaton Bussmann Short-Circuit Guide.  |  amplifydesign.ca
🏠 Suite Feeder Schedule Generator
Auto-generates voltage-drop-limited cable schedule for multi-unit residential suite feeders. Standalone tool — no project setup required.
🏠 Suite Feeder Schedule Generator Auto-calculates max feeder length per conductor size at your demand current
CEC Classification: Meter Stack → Suite Panel = FEEDER (CEC Rule 8-102 — 3% max cumulative). Suite Panel → Outlets = BRANCH (remaining budget to 5% total). VD budget split: feeder consumes budget from source, branch gets whatever remains.
Upstream (MS feeder) VD: %  ·  Branch remaining: 3%
(5% CEC 8-102 total = upstream + feeder + branch)
⚡ Feeder Breaker (for drawing note)
This value appears on the drawing note only. The schedule math is based on the design current (panel × demand factor), not the breaker size. Cable lug fit to be verified against the specified meter stack supplier.
(Optional) Flags cables that MAY exceed typical panelboard plug-on breaker lug ranges. Meter stack breakers often have looser lug ranges — verify with supplier.
Design Current
67A
VD calculated on this
Max VD Allowed
4.16V
2% × 208V
Feeder Breaker
70A
Next standard above demand