Why Electrical Panel Board Selection Is Critical in Factories

Factories operate with:

• Continuous loads

• Heavy motors

• Sensitive control systems

• Tight production schedules

A poorly selected panel board leads to:

• Frequent breaker tripping

• Overheating and hot spots

• Fire risk

• Costly production downtime

• Limited capacity for expansion

The right panel board, on the other hand, becomes the backbone of reliable power distribution.

What Is an Electrical Panel Board in a Factory Setting?

An electrical panel board is a centralized enclosure that:

• Receives electrical power

• Distributes it to multiple circuits

• Protects equipment through breakers and protective devices

In factories, panel boards typically include:

• Main Distribution Panels (MDP)

• Sub Distribution Panels (SDP)

• Motor control and power panels

Step 1: Understand Your Factory’s Electrical Load

Before choosing a panel board, you must understand:

• Total connected load

• Continuous vs intermittent loads

• Motor starting currents

• Future expansion requirements

Key Load Considerations

• Motors and VFDs

• Production machinery

• HVAC systems

• Lighting and auxiliary loads

⚠️ Choosing a panel based only on current needs is one of the most common and expensive mistakes.

Step 2: Choose the Correct Panel Board Type

Main Distribution Panel (MDP)

Used when:

• Receiving power directly from transformer or utility

• Handling high current ratings

• Feeding multiple subpanels

Sub Distribution Panel (SDP)

Used when:

• Distributing power to specific production zones

• Isolating sections of the factory

• Improving maintenance and fault isolation

Step 3: Select the Proper Current Rating and Capacity

Panel boards must be sized to handle:

• Maximum demand load

• Motor starting surge

• Harmonic loads from VFDs

Best Practice

Always design with:

• 20–30% spare capacity

• Space for additional breakers

This ensures:

• Safe operation

• Longer panel lifespan

• Smooth factory expansion

Step 4: Breaker Type and Coordination Matters

Not all breakers are the same.

Factories typically require:

• Molded Case Circuit Breakers (MCCB)

• Air Circuit Breakers (ACB) for high-capacity panels

Proper breaker coordination ensures:

• Faults are isolated locally

• The entire plant does not shut down

Poor coordination results in total power loss from minor faults.

Step 5: Consider Environmental Conditions

Factories are harsh environments.

Your panel board must be suitable for:

• Heat

• Dust

• Moisture

• Oil mist or chemicals

Enclosure Ratings

• Indoor: Standard steel enclosures

• Industrial environments: IP-rated or weatherproof panels

Ignoring environmental conditions leads to corrosion, insulation failure, and overheating.

Step 6: Separate Power, Lighting, and Control Loads

A professional factory panel layout separates:

• Power panels (motors, machines)

• Lighting panels

• Control and instrumentation panels

This separation:

• Improves safety

• Reduces electrical noise

• Simplifies troubleshooting

Step 7: Plan for Preventive Maintenance and Thermography

A good panel board design allows:

• Easy access for inspection

• Clear labeling

• Space for thermal scanning

Why This Matters

Most electrical fires start from:

• Loose connections

• Overloaded breakers

• Undetected hot spots

Step 8: Ensure Compliance with Philippine Standards

Factories in the Philippines must comply with:

• Philippine Electrical Code

• Utility requirements (e.g., Meralco)

• PEZA and industrial zone standards

Non-compliant panels risk:

• Failed inspections

• Operational delays

• Insurance issues

Always work with licensed electrical engineers and contractors.

Common Mistakes When Choosing Panel Boards for Factories

From decades of site corrections, the most common errors include:

• Undersized busbars

• No allowance for expansion

• Mixed lighting and motor loads

• Poor labeling and documentation

• Cheap components not suited for industrial duty

These mistakes cost far more to fix later than doing it right the first time.

Industries That Require Heavy-Duty Panel Boards

• Manufacturing plants

• Food and beverage processing

• Electronics and semiconductor factories

• Logistics and warehousing facilities

• PEZA-registered export facilities

Each requires custom-designed panel board solutions, not off-the-shelf units.