AMPLIFY VOLT/SCCR Calculator

💾 Save / Load Project

Save your project to a .avolt file. Opens on any computer — no cloud, no account.

🔵

Node Manager

Define all nodes (transformer, panels, disconnects). Configure system settings below, then go to Segment Analysis to wire them up.

Node Name

Node Type

💡 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

⚡ Phase Type

Source Voltage (V)

Global Temp Rating

Project Name

Auto Material Selection

Auto AL/CU per CEC rules

≥60A feeder → AL | <60A / small size → CU

⚙️ Cable Selection Mode

Auto: optimizer picks cable & sets | Manual: you pick, calcs still validate

🎯 VD Design Targets

VD Budgeting Mode

Flat: your design target applies equally to all feeder/panel/meter-stack nodes. Recommended for most projects.

Feeder Design Target (%)

Warn threshold | CEC max 3.0%

Feeder Hard Limit (%)

Hard fail — CEC Rule 8-102

Branch Hard Limit (%)

Load endpoints — CEC max 5.0%

Load Power Factor — VD per CEC Table D3

Table D3 K (Ω/km @ 75°C) incl. AC reactance — cable vs raceway column auto per install method

Parallel-Run Bonding — Rule 10-616(4) Divide Table 16 rating by # of parallel groups (per-raceway bond)

OFF = full-size bond in every raceway (conservative). ON = CEC 10-616(4) division — smaller, code-minimum bonds.

🔧 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.

Raceway Max (MCM)

Indoor pulls, tight bends

Underground Max (MCM)

Duct bank pulling

Direct Buried Max (MCM)

Pulling machines available

Free Air Max (MCM)

No bending constraints

Aerial Max (kcmil)

CEC Table 36 AAC sizes

🏭 Source Configuration (for SCCR)

Source Type

Utility transformer — ISC from kVA and Z% impedance

⚡ Utility Transformer

kVA Rating

Impedance Z%

Worst Case Factor

Motor Contribution

⚙

Short Circuit Calculation (Bussmann P2P Method)

Available fault-current estimate only — verify equipment interrupting rating/SCCR per CEC Rule 14-012

OFF ON

One-Line Diagram Preview

⚡

Segment Analysis

Cable & conduit auto-sized. ISC/VD calculated per segment.

Visual One-Line

Style: Drag nodes to reposition · Drag the amber dot on a node's edge to another node to create a segment

Select a node to see details.

📊 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%

📉

Voltage Drop Results

CEC Rule 8-102 — 3% feeder / 5% total

#	Segment	From → To	Length (ft)	Conductor	Sets	Current/Set	K (CEC)	Area mm²	CM	Seg VD (V)	Seg VD%	Cum VD%	End Voltage	Status

Formula — CEC 2024 Table D3 Method (CSA C22.1 Appendix D)VD = P × I × K × L(m) / 1000 | K = Table D3 value (Ω/km @ 75°C) including AC reactance at the selected power factor (100/90/80% or DC), cable vs raceway column chosen per install method | P = 2 (1φ) or 1.732 (3φ) | L = one-way length (ft → m) | AAC aerial sizes (266.8–477 kcmil) interpolated between Table D3 rows

⚡

Fault Current (SCCR)

Bussmann P2P Method — CEC Rule 14-012

#	Segment	Length	C-Value	Sets	ISC In (A)	f Factor	M Factor	ISC Out (A)	AIC Rating	AIC Status

Bussmann P2Pf = (1.732 × L × ISC_in) / (C × n × V) | M = 1/(1+f) | ISC_out = ISC_in × M

🔌

Cable Selection Validation (CEC Tables 2/4/D11A/D11B)

Derated ampacity ≥ load current per set

#	Segment	Conductor	Table	Base (A)	Derating	Derated (A)	Load (A)	Status

Underground (D11A/D11B): 90°C base ×0.886 for 75°C terminations. Raceway/Free Air: Table 5A ambient derating applied.

🔗

Bonding & Grounding Conductor Requirements

CEC Table 16 / Rule 10-616 and Rule 10-114

⚡ Bonding Conductor Sizing (CEC Table 16 / Rule 10-616)

#	Segment	Circuit Ampacity	Cu Bonding	Al Bonding	CEC 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.

✅

CEC Rule 8-102 Compliance — Node Status

Cumulative VD from Transformer to each node. Feeder 3% vs Branch/Load 5%

Node	Type	Cumulative VD%	Targets ▶Design ⚠Warn ✗Fail	Status	Rule

📋

Feeder Notes for Drawings

Auto-generated — copy directly into drawing callouts

Numbering: start at Applies to Copy All ↑

Format: [Prefix] [Amps] [Sets]-[Size] [Material] & [Bond] BOND IN [Conduit] [MIN.] [OR EQUAL] [VD%]

⚠️

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

📋 Calculation Basis & Design Standards

Methodology · Code References · Firm Info · Printable Submittal

🏢 Firm & Engineer Information Appears on printed submittal

Firm Preset

Show "Powered by Amplify Design" footer

Firm / Company Name

Trade Name (if different)

Website

Engineer / Designer Name

License / Registration

Province / Jurisdiction

Project Name

Project Number

Revision

🏠 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.

🔗 Sync with Segment Analysis (for dead-accurate match)

To match a specific suite feeder you designed in Segment Analysis exactly, pick that segment below. The schedule will auto-set voltage, VD budget, design current, and upstream VD. Length rounding will be disabled so distances match exactly.

Pick a suite feeder segment to sync

Feeder Breaker / OCP (A) — not panel frame

Demand Factor

System Voltage

VD Budget for Feeder (%)

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.

Tenant Breaker Size

Show conservative lug-fit advisory

(Optional) Flags cables that MAY exceed typical panelboard plug-on breaker lug ranges. Meter stack breakers often have looser lug ranges — verify with supplier.

Temp Rating

Show CU

Length Rounding

Show AL

Design Current

100A

VD calculated on this

Max VD Allowed

4.16V

2% × 208V

Feeder Breaker

70A

Next standard above demand

Amplify Design

I&R Design Consultant

amplifydesign.ca

CALCULATION BASIS

Voltage Drop & Short Circuit Analysis

CEC CSA C22.1:2024

Project

—

Project No.

—

Engineer

—

Date / Rev

—

1 — Design Parameters

Parameter	Value Selected	Basis / CEC Reference
System Voltage	—	As per utility service agreement
Phase Configuration	—	3-wire + neutral per CEC Rule 4-024
Temperature Rating	—	CEC Rule 4-006 — termination rating governs
Conductor Material	—	Material is a design choice; verify conductor type, equipment listing, and terminal suitability
VD Design Target (Feeder)	—	CEC Rule 8-102 max 3% feeder, 5% total
VD Hard Limit (Feeder)	—	CEC Rule 8-102(1) — mandatory maximum
Jurisdiction	Alberta, Canada	CSA C22.1:2024 (CEC 2024)

2 — Voltage Drop Calculation Method

Voltage drop is calculated using the CEC Table D3 impedance method per CSA C22.1:2024 Appendix D. Table D3 resistance/reactance values are selected by material, conductor size, installation geometry, and power factor, with the Table D3 Note 3 temperature multiplier applied.

VD (V) = (K × P × L × I) / CM

Symbol	Description	Value / Source
K	CEC Table D3 impedance (Ω/km @ 75°C)	CEC 2024 Table D3 — includes AC reactance & power factor
P	Phase factor	3-phase: 1.732 (√3) \| Single-phase: 2.000
L	One-way conductor length	Per design (feet)
I	Current per conductor set	Load (A) ÷ parallel sets
CM	Conductor area in circular mils	CEC Table D5 (mm²) × 1973.5 conversion factor

Material	60°C (K)	75°C (K)	90°C (K)
Copper (CU)	11.7	12.3	12.8
Aluminum (AL)	19.6	20.6	21.6

VD% = (VD ÷ System Voltage) × 100 | Cumulative VD traced from transformer secondary to each node.

3 — Conductor Ampacity & Derating

Conductor ampacity is selected per applicable CEC tables based on installation method. Where 90°C rated conductors are installed with 75°C rated terminations, ampacity is derated per CEC Rule 4-006 (multiply 90°C table value by 0.886 to obtain 75°C equivalent).

Install Method	CU Table	AL Table	Derating Basis
Underground Duct Bank	CEC Table D11A	CEC Table D11B	90°C base × 0.886 for 75°C terminations (Rule 4-006). Detail column = conduits in duct bank.
Direct Buried	CEC Table D8A	CEC Table D8B	90°C base × 0.886 for 75°C terminations. Detail 1 or 2 per CEC Diagram D8.
Raceway / Conduit	CEC Table 2	CEC Table 4	Table 5A ambient temperature derating applied at selected ambient °C.
Free Air	CEC Table 1	CEC Table 3	Table 5A ambient temperature derating applied.
Aerial NSC (Bundled)	CEC Table 36B (CU)	CEC Table 36A (AL)	NSC Triplex / Quadruplex. Wind-cooled ambient derating: AL 30°C=1.0, 35°C=0.94, 40°C=0.88 (T36A note 2); CU 30°C=1.0, 35°C=0.92, 40°C=0.84 (T36B note 2). Sizes #6 AWG to 500 kcmil AL, #6–4/0 CU. Includes AAC sizes 266.8, 336.4, 397.5, 477 kcmil.

Parallel sets: each set must individually satisfy ampacity ≥ load ÷ sets. Underground parallel sets must use the corresponding Detail column (e.g. 2 sets = minimum Detail 2) per CEC Diagram D11.

4 — Short Circuit Current (Bussmann Point-to-Point Method)

Available fault current is calculated using the Eaton Bussmann Point-to-Point (P2P) Method per CEC Rule 14-012. Transformer secondary ISC is calculated from nameplate kVA and impedance Z%. Conductor impedance is accounted for using Bussmann C-values (Table 4 of the Bussmann Short-Circuit Guide).

ISC_secondary = FLA × (100 / Z%) | f = (P × L × ISC_in) / (C × n × V) | M = 1 / (1 + f) | ISC_out = ISC_in × M

Symbol	Description	Value / Source
P	Phase factor	3-phase: 1.732 \| Single-phase: 2.000
L	One-way conductor length (ft)	Per design
C	Conductor impedance constant	Bussmann Short-Circuit Guide Table 4 — varies by material, conduit type, cable size
n	Number of parallel sets	Per design
V	System line-to-line voltage (V)	Per design
Worst Case	Voltage tolerance factor	×0.9 (±10% voltage variation) — conservative per Bussmann guide

C-values sourced from Eaton Bussmann Short-Circuit Current Calculation Guide (Table 4) at 75°C conductor temperature. Four tables used: CU/AL × Steel/Non-Magnetic conduit.

5 — Bonding & Grounding

Requirement	CEC Rule	Sizing Basis
Equipment Bonding Conductor	Rule 10-616 / Table 16	Sized per circuit ampacity — largest overcurrent device protecting that circuit
Grounding Electrode Conductor (GEC)	Rule 10-114 / Table 16	Sized per service ampacity at point of connection to grounding electrode
System Grounding	Rule 10-204	Neutral grounded at service — one point only per Rule 10-200

6 — Calculation Summary (Live — Auto-Updated)

#	Segment	Cable	Sets	Method	Table	Base (A)	Derated (A)	Load (A)	Seg VD%	Cum VD%	ISC Out	Status

7 — Code & Reference Documents

Document	Edition	Application
CSA C22.1 — Canadian Electrical Code Part I	2024 (25th Edition)	Primary electrical design standard — all rules cited herein
Eaton Bussmann Short-Circuit Current Calculation Guide	Current	P2P fault current method, C-value tables
CEC Appendix D — Tables D5, D8A/B, D11A/B	CSA C22.1:2024	Conductor ampacity, circular mil areas, voltage drop
CEC Table 2, 4 (CU/AL Raceway Ampacity)	CSA C22.1:2024	Conductor ampacity in raceways/conduit
CEC Table 5A (Ambient Derating)	CSA C22.1:2024	Temperature correction factors for raceway/free air
CEC Table 16 (Bonding/GEC)	CSA C22.1:2024	Equipment bonding and grounding electrode conductors

Engineering Reference Only. This calculation basis document is generated by the Amplify VD/SCCR Calculator and is intended to support engineering review. All calculations shall be verified by a Professional Engineer (P.Eng) or Master Electrician licensed in Alberta, Canada prior to permit submission. Final design is the responsibility of the engineer of record.

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