Ampora is an AI-powered electrical calculator and reference app designed for electricians and electrical engineers. It includes professional tools like voltage drop calculator, wire sizing calculator, conduit fill calculator, arc flash analyzer, load calculation tools, and a comprehensive NEC code reference database.

What electrical calculators does Ampora include?

Ampora includes six professional electrical calculators: Voltage Drop Calculator, Wire Sizing Calculator, Conduit Fill Calculator, Arc Flash Analyzer, Load Calculation Tool, and Motor Sizing Calculator. All calculations are NEC code-compliant.

Does Ampora have an AI assistant for electrical questions?

Yes, Ampora features an advanced AI assistant trained on electrical engineering and NEC code. You can ask questions about electrical work, troubleshooting, code compliance, and get instant, accurate answers backed by NEC references.

Is Ampora compliant with NEC electrical codes?

Yes, all Ampora calculators and references are based on NEC 2023 standards. The app includes a comprehensive NEC code database with search functionality and article references.

Can Ampora analyze photos of electrical panels?

Yes, Ampora includes AI-powered photo analysis. Upload photos of electrical panels, wiring, and equipment to get intelligent analysis, safety recommendations, and troubleshooting guidance.

How do I calculate voltage drop for electrical circuits?

Use Ampora's Voltage Drop Calculator to calculate voltage drop for single-phase and three-phase circuits. Enter your circuit voltage, current, wire gauge, and distance to get accurate NEC-compliant voltage drop calculations. The app uses the standard formula VD = (2 × K × I × D) / CM for single-phase and VD = (1.732 × K × I × D) / CM for three-phase circuits.

What is the best app for electricians?

Ampora is designed specifically for electricians and electrical professionals. It combines AI assistance, professional calculators (voltage drop, wire sizing, conduit fill, arc flash), NEC code reference, photo analysis, and troubleshooting tools in one mobile app. It's free to download from the App Store.

How do I size electrical wire using NEC tables?

Wire sizing requires checking NEC Table 310.16 for conductor ampacity based on insulation temperature rating (60°C, 75°C, or 90°C). Apply temperature correction factors if ambient temperature exceeds 30°C, and conduit fill derating if more than 3 current-carrying conductors are in a raceway. Ampora's Wire Sizing Calculator handles all these factors automatically.

What is the NEC 3% voltage drop rule?

NEC 210.19(A) Informational Note recommends maximum 3% voltage drop for branch circuits and 5% total voltage drop (feeder + branch circuit combined). While these are recommendations, not requirements, many inspectors enforce them. For a 120V circuit, 3% equals 3.6V maximum drop.

Where is GFCI protection required by NEC code?

Per NEC 210.8, GFCI protection is required for 125V-250V receptacles in bathrooms, kitchens (countertop and within 6 feet of sink), garages, outdoors, basements, crawl spaces, laundry areas, and within 6 feet of any sink. The NEC 2023 expanded requirements to include 250V receptacles in many locations.

What is AFCI protection and where is it required?

Arc-Fault Circuit Interrupter (AFCI) protection detects dangerous arcing conditions that could cause fires. Per NEC 210.12, AFCI protection is required for 120V, 15A and 20A branch circuits in dwelling unit bedrooms, living rooms, kitchens, dining rooms, family rooms, hallways, closets, and similar rooms.

How do I calculate conduit fill?

Conduit fill is calculated using NEC Chapter 9 tables. One conductor can fill 53% of conduit area, two conductors can fill 31%, and three or more can fill 40%. Use Ampora's Conduit Fill Calculator to automatically determine the correct conduit size based on conductor types, sizes, and quantities.

Is Ampora free to use?

Yes, Ampora is free to download from the App Store. The app includes AI assistant, all six electrical calculators, NEC code reference, photo analysis, and troubleshooting tools. No credit card required to get started.

Can I use Ampora offline on job sites?

Ampora's electrical calculators and reference formulas work offline. The AI assistant and photo analysis features require an internet connection to process queries through our AI system.

What is arc flash analysis?

Arc flash analysis calculates incident energy levels and arc flash boundaries to determine required personal protective equipment (PPE) when working on energized electrical equipment. Ampora's Arc Flash Calculator follows IEEE 1584 and NFPA 70E standards to provide incident energy, working distance, and PPE category recommendations.

How do I calculate electrical load for a service?

Residential service load calculations follow NEC Article 220. Start with 3 VA per square foot for general lighting, add small appliance circuits (1500 VA each), laundry circuit (1500 VA), and individual appliance loads. Apply demand factors per NEC Table 220.42 and 220.54. Ampora's Load Calculation tool automates this process.

What are NEC receptacle spacing requirements?

Per NEC 210.52, no point along the floor line of any wall space can be more than 6 feet from a receptacle outlet. This means receptacles must be spaced no more than 12 feet apart. Any wall section 2 feet or wider requires a receptacle. Kitchen countertops require receptacles so no point is more than 24 inches from an outlet.

Does Ampora work for commercial electricians?

Yes, Ampora is designed for both residential and commercial electricians. It includes commercial-focused tools like motor sizing calculator with full load current tables, three-phase voltage drop calculations, arc flash analysis, and NEC code reference covering commercial requirements.

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Before calling for inspection: verify permits are posted, all work is complete for that phase, boxes are accessible, panels are open, and work area is clean. Use Ampora's AI assistant to verify code compliance on specific questions like GFCI locations, AFCI requirements, box fill, and receptacle spacing before the inspector arrives.

Kitchen Electrical Requirements: NEC Code Guide for Electricians | Ampora

Small Appliance Branch Circuits

NEC 210.11(C)(1) requires a minimum of two 20-amp small appliance branch circuits to serve receptacle outlets in the kitchen, pantry, breakfast room, dining room, and similar areas. These circuits are dedicated to countertop and wall outlets for portable appliances.

Small Appliance Circuit Requirements (NEC 210.52(B))

Minimum 2 circuits: At least two 20A circuits required
Circuit rating: 20 amperes (no 15A circuits allowed)
12 AWG wire minimum: Required for 20A circuits
Dedicated purpose: Only receptacle outlets, no lighting permitted
Coverage area: Kitchen, pantry, dining room, breakfast nook

What Can Be Connected

Permitted on Small Appliance Circuits

✓ Countertop receptacles
✓ Wall receptacles in kitchen
✓ Receptacles in pantry
✓ Dining room receptacles
✓ Electric clock receptacle
✓ Gas range receptacle (ignitor)

NOT Permitted on Small Appliance Circuits

✗ Lighting outlets
✗ Dishwasher (needs dedicated circuit)
✗ Garbage disposal (needs dedicated circuit)
✗ Refrigerator (should be dedicated)
✗ Microwave (if over 50% circuit capacity)
✗ Receptacles in other rooms (except dining)

Exception: Refrigerator Circuit

Per NEC 210.52(B)(1) Exception 2, a refrigerator can be supplied by an individual 15A branch circuit rated at 15 amperes or greater. This allows a dedicated refrigerator circuit that isn't one of the two required small appliance circuits. Best practice is a dedicated 20A circuit for the refrigerator.

Countertop Receptacle Requirements

NEC 210.52(C) establishes specific requirements for countertop receptacles to ensure appliances can be used anywhere on the countertop without using extension cords.

The 24-Inch / 48-Inch Rule

The fundamental rule: No point along the countertop wall line can be more than 24 inches from a receptacle outlet.

Maximum spacing: 48 inches between receptacles
24" rule: Any point must be within 24" of a receptacle
Measurement: Along the wall line at countertop level

Wall Counter Space Requirements

Counter Space Width	Receptacles Required	Notes
Less than 12"	None required	Not considered counter space
12" or more	At least 1	Qualifies as counter space
12" to 48"	1	One receptacle covers entire span
Greater than 48"	2 or more	Apply 24" rule for placement

What Breaks Counter Space

Range tops and sinks: Counter spaces separated by these are treated individually
Corner measurements: Corners are measured around, not diagonally
Refrigerators: Do not break counter space

Receptacle Placement Height

Per NEC 210.52(C)(5), countertop receptacles must be located:

Not more than 20 inches above the countertop surface
Not more than 12 inches below the countertop (if below)
Exception: For physically impaired or elderly, may be mounted not more than 48" above floor

Island and Peninsula Requirements

Kitchen islands and peninsulas have specific receptacle requirements per NEC 210.52(C)(2) and (C)(3) that are often misunderstood.

Island Countertop Requirements

An island countertop with a long dimension of 24 inches or greater AND short dimension of 12 inches or greater requires:

At least one receptacle must be installed
For larger islands: Apply the 48-inch maximum spacing rule
Location: Must serve the countertop, not floor level

Peninsula Countertop Requirements

A peninsula countertop with a long dimension of 24 inches or greater AND short dimension of 12 inches or greater requires:

At least one receptacle must be installed
Measured from connecting edge: Not from wall
For longer peninsulas: Additional receptacles per 48" rule

Island Receptacle Placement Options

Countertop Level

• Pop-up receptacles in countertop
• Receptacles in end of island cabinet
• Not more than 20" above countertop

Below Countertop

• In side of island cabinet
• Not more than 12" below countertop
• Must not be face-up (no floor outlets)

No Floor Receptacles for Countertops

Receptacles installed in a floor are not permitted to serve countertop surfaces per NEC 210.52(C)(5). Island receptacles must be mounted in or on the island itself, not in the floor.

GFCI Protection Requirements

NEC 210.8(A)(6) requires GFCI protection for kitchen receptacles. The NEC 2023 expanded these requirements significantly.

Kitchen GFCI Requirements (NEC 2023)

GFCI protection required for all 125V through 250V receptacles:

Serving countertop surfaces: All countertop receptacles
Within 6 feet of sink: Any receptacle within 6 feet measured along wall line
All kitchen receptacles: NEC 2023 requires GFCI for ALL kitchen receptacles rated 50A or less

NEC 2023 Changes to Kitchen GFCI

The NEC 2023 significantly expanded kitchen GFCI requirements:

All kitchen receptacles: Not just countertop, ALL receptacles in kitchen
250V included: Expanded from 125V to include 250V receptacles
Dishwasher: Now requires GFCI protection
Refrigerator: Now requires GFCI protection
Up to 50 amps: Covers range receptacles in some cases

GFCI Protection Methods

GFCI receptacle: First receptacle on circuit can protect downstream
GFCI circuit breaker: Protects entire circuit from panel
Combination AFCI/GFCI: Available for dual protection

Dedicated Circuit Requirements

Several kitchen appliances require or benefit from dedicated circuits per NEC requirements or best practices.

Appliance	Circuit Required	NEC Reference	Notes
Dishwasher	20A dedicated	422.16(B)(2)	GFCI required (NEC 2023)
Garbage Disposal	20A (can share with DW)	210.23	Can share with dishwasher only
Refrigerator	15A or 20A dedicated	210.52(B)(1) Ex. 2	Recommended, not required
Microwave (built-in)	20A dedicated	Best practice	If >50% of circuit rating
Electric Range	40A or 50A dedicated	210.19, 210.23	8 AWG for 40A, 6 AWG for 50A
Electric Wall Oven	Per nameplate	422.10	Typically 30A-50A

Dishwasher/Disposal Shared Circuit

Per NEC 210.23(A)(1), a dishwasher and garbage disposal may share a 20A circuit if they are the only loads on that circuit. This is the only permitted sharing arrangement. Both loads must have disconnecting means, and the combined load should not exceed circuit capacity.

Kitchen Load Calculations

For dwelling unit service calculations per NEC Article 220, kitchen loads are calculated as follows:

NEC 220.52 - Small Appliance and Laundry

Small appliance circuits: 1500 VA per circuit
Minimum 2 circuits = 3000 VA minimum
Laundry circuit: 1500 VA
Additional required load
Demand factor: Applied to first 3000 VA + 35% of remainder
Per NEC Table 220.42 for general lighting and receptacles

Typical Kitchen Circuit Summary

Circuit	Rating	Wire Size (Cu)	Qty
Small appliance #1	20A	12 AWG	1
Small appliance #2	20A	12 AWG	1
Refrigerator	20A	12 AWG	1
Dishwasher	20A	12 AWG	1
Disposal	20A*	12 AWG	1*
Range/Cooktop	50A	6 AWG	1
Microwave	20A	12 AWG	1

*Disposal can share circuit with dishwasher

Common Inspection Failures

These are the most common kitchen electrical violations that cause failed inspections:

1. Insufficient countertop receptacles

Failing to meet the 48" maximum / 24" rule for countertop spacing

2. Missing island/peninsula receptacles

Islands meeting size requirements (24" x 12") need at least one receptacle

3. GFCI protection missing or improperly located

All countertop receptacles and receptacles within 6' of sink require GFCI

4. Only one small appliance circuit

Minimum of two 20A small appliance circuits required

5. 15A circuits for countertop receptacles

Small appliance circuits must be 20A, not 15A

6. Receptacles too high above countertop

Maximum 20" above countertop surface

Kitchen Electrical Installation Checklist

Pre-Inspection Verification

☐Minimum 2 small appliance circuits (20A each)

☐Countertop receptacles meet 24"/48" spacing rule

☐All countertop receptacles GFCI protected

☐Receptacles within 6' of sink GFCI protected

☐Island/peninsula receptacles installed (if applicable)

☐Dishwasher on dedicated 20A circuit with GFCI

☐Refrigerator circuit installed

☐Range/cooktop circuit properly sized

☐Receptacles not more than 20" above countertop

☐All receptacles are grounding type

☐No lighting on small appliance circuits

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