Earlier, power cables of 11 KVA and 33 KVA were laid underground without any proper protection/suitable casing, with sand filling at certain depth and one layer of bricks/tiles on top of the trench for identification. With the introduction of HDPE power ducts in multilayer with silicon layer inside, made available by TimeTechnoplast Ltd, cabling work in the Smart Cities would meet international standards, made in high-density polyethylene primarily intended for buried laying of underground power cables up to 400 mm sq. as per NEMA TC-7 standard with latest amendments.

Three-layer construction 

The HDPE Power Duct pipe has three concentric layers viz. outer layer, middle layer and inner layer with ribs. The outer layer is made of HDPE in red colour, middle layer is made of HDPE in translucent (natural) and the inner ribbed layer of solid permanent lubricant (PLB), i.e.,Silicore. These concentric layers are continuous, co-extruded and integral part with HDPE outer/middle layer and distinctively visible in crosssection under normal lighting conditions and outer layer generally red colour for identification.

The inner layer of solid permanent lubricant will not come out during storage, usage and throughout the life of the pipe. The red outer colour shall be uniform throughout the length of the pipe. The inner ribbed 7 silicon layer is as per standard NEMA TC7 specification and shall have the outer pipe diameter as 110mm upwards.

Accessories 

• 1. ABS split type coupler

Material: ABS 

The coupling will provide a durable water tight joint between two pipes without deteriorating the strength of the pipes and shall meet the air pressure test of 2 kg/cm2 for a minimum period of 2 hours without any leakage. This will prevent water ingress.

• 2. ABS Spacers 

Material: ABS 

Spacers are required for maintaining the proper uniform distance between two power ducts in the trench and are modular in structure which can be laid in grids and secured with sand.

Innovative details in project:

• Manufacturing three-layer HDPE power ducts in sizes 160mm, 200mm and 225mm; used first time in India as power duct with special split type coupler joint for two pipes and spacers for cluster banks for laying power cables of 11 KVA and 33 KVA.
• Special red colour for identification and special ribbed design for lesser friction (height and nos selection) inside, and internal silicon layer acts as self-lubricant arrangement. 

Impact on project: 

• Proper formation of cable clusters required in town plan, in the utility ducts.
• Due to necessary arrangement of future provision of cables, laying is easy and avoid cable damages.
• Easy laying/pulling of cables, hence completion will be fast and repair/ maintenance easy
• Virtually zero maintenance and an estimated life of over 50 years under standard operating conditions

Project location:

• Amravati Development Corporation Ltd (ADCL, AP) / AP Capital Region Development Authority (APCRDA)
• Ranchi Smart City
• And several others 

For further information, contact: 

Time Technoplast Ltd 55 Corporate Avenue, 2nd Floor, Saki Vihar Road, Andheri (E), Mumbai 400072, Maharashtra 

Contact: Haresh R Pillay, Executive Director, 

Mobile: 9821126203, 

Email: haresh@timetechnoplast.com