Aerial bundled cables: laying and handling

Laying temperature and pre-warming

National rules

• Italy HD 603 7-A, 7-B: At least 0 °C, while laying or handling.Sources: HD 603 7-B-19 item 5.2 (read in the standard text)
• Italy HD 620 10-I1, 10-I2, 12-I: At least -25 °C, while laying or handling.Sources: HD 620 10-I1-15, 10-I2-17, 12-I-16 (read in the standard text)

Laying in winter? Pro checks your town and month against this limit. See Pro

Bending radius

National rules

• Italy HD 603 7-A: 14 D while laying; 7 D for one controlled bend.Sources: HD 603 7-A-23 (read in the standard text)
• Italy HD 603 7-B: 18 D while laying; 9 D for one controlled bend. D here is the diameter of the largest single core.Sources: HD 603 7-B-20 (read in the standard text)
• Italy HD 620 10-I2: 21 D while laying; 10.5 D for one controlled bend. D here is the core diameter.Sources: HD 620 10-I2-17 (read in the standard text)

Pulling force and method

National rules

• Italy HD 620 10-I2: Preassembled cable with a messenger: the stocking on the messenger carries the load, a second stocking on the bundle only holds the cores; the maximum stress is the maker's.Sources: HD 620 10-I2-17 items 5.3, 5.3.1 (read in the standard text)
• Italy HD 603 7-A, 7-B · HD 620 10-I1, 10-I3, 12-I: On a cable grip at most 10 000 N; on aluminium conductors 30 N/mm².Sources: HD 603 7-A-23, 7-B-20; HD 620 10-I1-16, 10-I3-16, 12-I-17 (read in the standard text)

Work out the pull for your route: the verdict is free, the numbers and the PDF come with Pro. Pull calculation in the cable designer · See Pro

Depth, cover and laying

National rules

• Italy HD 603 7-A · HD 620 10-I1, 10-I2, 12-I: Brackets every 20 D or 2 m, whichever is lower; 50 % more on vertical runs.Sources: HD 603 7-A-22 5.1.3; HD 620 10-I1-15 5.1.3 (read in the standard text)

Drum handling

• Keep the drum upright, its axis horizontal, in storage and in transport; never lay it flat on a flange.Sources: HD 620 Part 1 A.3.2.5, A.3.3.2; IS 1255 7.7, p. 25; Prysmian 2024; Reka (read in the standard text)
• Never drop a drum. Without lifting gear, use a ramp of about 1:4 (IS 1255: 1:3 to 1:4) with ropes or a winch and a sand bed at the foot.Sources: HD 620 Part 1 A.3.3.3; HD 603 3-I 3.3; IS 1255 7.3, p. 24; Prysmian 2024 p. 6; Reka p. 6; Nexans 2021 p. 4 (read in the standard text)
• Roll it only short distances on firm ground, in the direction of the arrow on the flange.Sources: HD 620 Part 1 A.3.3.4; HD 603 3-I, 3-L; IS 1255 7.4, p. 24; Prysmian 2024 p. 7; Nexans 2021 p. 3 (read in the standard text)
• Store it on level, firm, well-drained ground and turn it 90° every 3 months.Sources: IS 1255 7.5, 7.6, pp. 24 to 25; Prysmian 2024 p. 8, 9; Nexans 2021 p. 8, 9; Prysmian Türkiye 3.3 (read in the standard text)
• Leave the battens on until the cable is about to be laid: they keep off sun and knocks.Sources: HD 620 Part 1 A.3.2.5; BS 6622 D.5.2; IS 1255 7.8, p. 25; Nexans 2021 p. 11 (read in the standard text)
• Cable ends sealed with caps in transport, storage and laying. A cap missing for over a month, or a wet end: cut back 300 mm, check for moisture and cap again.Sources: HD 620 Part 1 A.3.2.3, A.4.7; HD 603 3-I 3.2; BS 6622 C.3; BS 5467 B.4; BS 7846 A.7.4; IS 1255 7.2, p. 24; Nexans 2021 p. 7; Draka (read in the standard text)
• Pay out tangentially, never over the flange, with the drum on an axle and jacks and braked. Top or bottom: IS 1255 says off the top; Southwire chooses by where the cable goes (the bottom into a floor conduit, the top into a tray); Nexans Belgium says the bottom, for safety.Sources: HD 620 Part 1 A.4.5; IS 1255 8.2, 8.3, 10.2; Southwire 2005 p. 2 to 3; Nexans Belgium FAQ; Prysmian 2024 p. 10; Draka p. 5, 9 (read in the standard text)

Every rule for a chosen drum, with its lagging, weight and return terms: Cable drum calculator

Sheath test after laying

No sheath test after laying was found for this family.

The tests after installation for one cable, with their voltages, in the cable designer: Test after installation