Electrical Design for Residential Building

Load Computation

• Total connected load (lighting, outlets, appliances)
• Demand load calculation (based on NEC/PEC standards)

Electrical Layout Plans

• Lighting layout
• Power outlet layout
• Aircon and appliance outlets
• Panel board locations

Circuiting and Branch Circuits

• Designation of circuit breakers per area or appliance
• Load balance across breakers
• Circuit routing with wire sizes

Panel Board Schedule

• Circuit number, breaker size, wire size, and connected load
• Voltage and phase specification
• Total main breaker sizing

Riser Diagram / Single Line Diagram (SLD)

• Service entrance to main panel
• Grounding system
• Transformer (if any)

Load Schedule / Load Analysis

• Individual and total loads
• Estimated power consumption in kW/kVA
• Load classification: lighting, convenience outlets, aircon, spare

Wire & Conduit Sizing

• Correct wire size for each circuit
• Conduit sizing for proper installation

Grounding and Earthing System

• Ground rod or ground plate specifications
• Ground wire sizing and layout

Compliance with Local Codes

• Philippine Electrical Code (PEC) provisions
• Local distribution utility (MERALCO, VECO, etc.) standards

Bill of Materials (BOM)

• Quantities of wires, conduits, boxes, outlets, switches, panels

Technical Specifications / Notes

• Equipment ratings
• Installation standards and requirements
• Notes on safety and clearances