Davao City High Priority Bus System (HPBS) Public Transport Electrification, Philippines

As the largest economic hub in southern Philippines, Davao City's HPBS project represents a flagship initiative under the government's large-scale construction program. The client, serving as the electrical contractor for this ambitious undertaking, faced several critical challenges:
Certification Barriers: Philippine grid operators enforce strict access standards for imported cables, with UL certification serving as a mandatory threshold. While local suppliers could provide partial solutions, they lacked comprehensive US standard certification systems, forcing clients into fragmented procurement strategies that increased coordination costs and compliance risks.
Complex Specifications: The project demanded a full-spectrum cable portfolio spanning from low-voltage control to medium-voltage distribution, including THHN 600V insulated wire PVC nylon, fire-rated cables, and medium-voltage power cables. Single-source suppliers capable of meeting all these diverse requirements were virtually nonexistent in the local market.
Delivery Pressure: Government project milestones are rigid, with substantial penalties for delays. The client needed a reliable partner capable of completing large-volume deliveries within a 90-day window.
Quality Consistency: Bus charging stations demand exceptional oil resistance and thermal stability from cables, with long-term reliability under the Philippines' tropical humid climate being a critical consideration.
Our Solution: One-Stop US Standard Cable Delivery
Based on the specific operational conditions, we developed a targeted product matrix solution:
THHN (Low-Voltage Primary Cable) — The Project's Core Product
Serving as the "vascular network" of the entire power distribution system, THHN 600V insulated wire PVC nylon handled the backbone power supply from distribution cabinets to charging piles.
Product Specifications:
• 1×3.5 mm²: Control circuits and signal transmission lines
• 1×14 mm²: Charging pile branch power supply and equipment internal wiring
Technical Parameters
1.THHN 600V insulated wire PVC nylon features copper conductor with PVC insulation and nylon jacket, rated 600V, with conductor temperature ratings of 90°C dry and 75°C wet, certified to UL83 (File No.: E467439). Annealed copper conductors, PVC insulation layer, and outer nylon jacket provide excellent oil, gasoline, and chemical resistance. Conductor sizes range from 14AWG to 1000kcmil; this project utilized 3.5mm² and 14mm² specifications with color coding per US standards: black (phase), white (neutral), green (ground). Suitable for dry/wet locations in conduit, tray, or equipment wiring, specifically adapted for demanding electric bus charging facility conditions.
Product Advantages:
• Nylon Jacket Technology: Compared to standard PVC insulated wire, the nylon outer layer reduces cable diameter by approximately 30%, saving valuable space in densely wired charging pile control cabinets
• Oil Resistance Rating: Passes UL oil immersion tests, addressing mechanical oil contamination from frequent charging gun insertion and removal
• Flame Retardance: VW-1 vertical flame test compliant, meeting fire safety requirements for public transportation venues

2. Fire Rated Cable — Safety Redundancy Design
Addressing mandatory fire protection codes for bus terminals, we supplied 2×1.5 mm² (emergency lighting circuits) and 3×2.5 mm² (fire pump power supply) specifications, ensuring circuit integrity during fire conditions.
3. THW (Auxiliary Power Cable) — Harsh Outdoor Environments
Selected 1×10 mm² (charging gun cables) and 1×25 mm² (grounding mains), moisture and UV resistant, adapted to the Philippines' rainy season high-humidity environment.
4. MV-90 (Medium Voltage Cable) — Substation Connection
Provided 1×3/0 AWG (95 mm²) and 1×300 kcmil (150 mm²) specifications, rated 5kV-35kV,承担 power transmission from urban grid to charging station transformers, with XLPE insulation ensuring long-term stability.
5. Royal Cord (Flexible Cable) — Mobile Equipment Power Supply
2×1.5 mm² and 3×2.5 mm² specifications for mobile maintenance equipment and temporary power points, high-flexibility design supporting frequent bending cycles.
Core Selling Points: Why the Client Chose GERITEL
Certification System: The "Golden Key" to International Markets
Our comprehensive US standard certification matrix was the decisive factor in the client's final selection:
• THHN: UL83 certification (E467439), covering full specification range
• THW: UL83 certification
• MV-90: UL1072 certification
In the Philippine market, many projects face customs detention or acceptance delays due to incomplete certifications. Our provision of original UL certificates and test reports enabled the client to smoothly pass compliance review by the Energy Regulatory Commission (ERC), avoiding potential delay losses of hundreds of thousands of dollars.
Engineering Experience: From "Supplier" to "Project Partner"
This was not our first infrastructure project of this nature. Our accumulated experience from previous light rail electrification and port shore power projects across Southeast Asia gave us insight into tropical climate cable selection nuances that others might overlook—such as recommending UV protective layers over THHN's nylon jacket for outdoor exposure, a suggestion later proven to significantly extend cable service life.
Delivery Capability: The Confidence of Scalable Production
Actual Delivery Data:
• THHN 600V insulated wire PVC nylon: 127,000 meters total (89,000 meters of 3.5mm² specification, 38,000 meters of 14mm² specification)
• Fire Rated Cable: 42,000 meters
• THW: 35,000 meters
• MV-90: 18,000 meters (3/0 AWG/95mm² and 300 kcmil/150mm² specifications)
• Royal Cord: 68,000 meters
A total of 290,000 meters of cable completed production, inspection, ocean freight, and customs clearance within 78 days, arriving at Davao Port 12 days ahead of contract milestones. Our Dongguan production base maintains monthly capacity of 5 million meters of US standard cables, capable of rapid response even to emergency volume increases.
Quality Control: Self-Requirements Beyond Standards
While the client only required IEC standards, we voluntarily adopted full US standard UL inspection processes: from resistivity testing of copper rod upon arrival, to online eccentricity monitoring during extrusion, to final product withstand voltage and insulation resistance sampling. Each batch includes Certificate of Analysis (COA) and material traceability codes, enabling 30-minute rapid response to any quality issues.

Project Execution: Key Milestones from Contract to Energization
Weeks 1-2: Technical coordination phase. Our engineering team conducted on-site surveys in Davao, confirming charging pile power distribution, routing, and environmental conditions, optimizing cable specification selection—upgrading portions originally designed for THW to THHN 600V insulated wire PVC nylon, saving the client approximately 8% in wiring space.
Weeks 3-10: Production and quality control. Dedicated production lines engaged, weekly progress and QC photo reports to client, with critical milestones involving third-party SGS factory supervision.
Week 11: Ocean freight and customs clearance. Full container shipping employed, Philippine BPS certification documents prepared in advance, ensuring customs clearance within 48 hours of port arrival.
Week 12: On-site delivery and technical support. Technical consultants dispatched to assist with cable installation guidance, with focused training on THHN 600V insulated wire PVC nylon nylon jacket stripping techniques (specialized tools required to avoid insulation damage).
Project Outcomes & Client Value
Delivery Results:
• 99.7% first-pass acceptance rate for all cable categories
• Project energization 15 days ahead of schedule
• Zero quality incidents, zero delay penalties
Client Feedback Summary
The client's project director indicated this was the smoothest cable procurement project they had executed in the Philippines. Most impressive was our 
pre-sales technical service—not selling products, but solving engineering problems. From initially planning to purchase only THHN to ultimately bundling all categories with us, the client recognized our one-stop supply capability.
Long-term Value:
Based on this cooperation, the client has included us in their annual strategic supplier list, with subsequent projects in Cebu and Manila already initiated for quotation.
Why Choose GERITEL as Your US Standard Cable Partner?
If you are participating in infrastructure or new energy projects in Southeast Asian countries such as the Philippines, Vietnam, or Indonesia, facing similar certification and delivery challenges, our advantages lie in:
Complete Certifications: Full UL, CSA, CE coverage, certificates verifiable on official websites
Comprehensive Product Range: From low-voltage control to high-voltage transmission, no fragmented procurement needed
Abundant Capacity: 100,000-meter+ orders routinely delivered, emergency order green channel available
 Engineering Mindset: Not just selling cables, but providing selection optimization and on-site support
Contact Us Today
Dongguan GERITEL Electrical Co., Ltd.
Your One-Stop US Standard Cable Solution Partner
Tel/WhatsApp/WeChat:
+86 135 1078 4550
+86 136 6257 9592
Email: manager01@greaterwire.com
Website: www.greaterwire.com