Find the cable drum a length needs
drum_fitWhich cable drum (reel) a length of cable needs, or how much one drum takes: whole layers and whole turns wound nested (each turn in the groove of the layer below, layers rising 0.866 dc) on a wound diameter of 1.05 x OD with a freeboard under the flange rim; cable makers' own capacity tables count aligned layers and print about 11 to 18 % less, and a drum wound loosely may hold less. Drums are KTG, Nordic K, older DIN, Spanish, NEMA, Turkish, Brazilian and Chinese series and makers' own sizes (plastic and plywood reels among them) as their makers print them, and the IS 10418:2024 sizes (India) as the standard's own Table 1 with no tare or load rating, each with its source and seen level; the barrel check uses the KTG minimum barrel table, and the cable's datasheet wins; a load rating is the maker's own, and a drum without one is not load checked (no load_ok). With reeling (and layers for a cylindrical drum), the NFPA 79 (2024) Table 12.7.3 derating of a motor-driven reeling drum. Free, deterministic, no LLM.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| D | No | A drum by its dimensions: flange diameter, mm. | |
| W | No | Winding width between the flanges, mm. | |
| d | No | Barrel diameter, mm, less than D. | |
| kg | No | Cable mass, kg/km: gives cable and gross (cable + tare) kg per drum and the maker's load check. | |
| od | Yes | Cable outer diameter, mm (a flat cable: its larger side). | |
| max | No | Most drums of one size the length may be split over. Default 1. | |
| kind | No | Cable kind for the smallest barrel (KTG table, x OD): flexible 12, lv-multi 15, lv-single 20, mv-multi 20, mv-single 25, hv 25, telecom 20, paper-lead 30. Default lv-multi. | |
| lang | No | The handling block's words: any of the site's 15 languages. | |
| pool | No | With length: 1 answers with pooled drum sizes (pools[], one row per nominal size and material, its makers' drums inside, each with its own numbers) instead of one row per maker's drum (fits[]). Default 0: the answer is unchanged. | |
| layers | No | With reeling: the layers wound, 1 to 5 (a cylindrical drum's factor depends on them, a radial drum's does not; NFPA 79 gives factors for 1 to 4, DIN VDE 0298-4 Table 27 for 1 to 5). Default 1. | |
| length | No | Cable length to wind, m. | |
| system | No | Drum system: KTG (the KTG rental pool, Europe), nordic-k (Nordic K series), din (older DIN 46391 series as Eland and Romagna Cavi print it), spanish (Spanish makers), EU (every European drum), NEMA (WC 26 classes), NA (every North American drum), TR (Turkish makers), IS (IS 10418:2024, India: the standard's own sizes, no tare or load), reels (plastic, plywood and cardboard reels), maker (one maker's own sizes), other (Brazil NBR 11137, Chinese steel drums) or all. Default all. | |
| lagging | No | Adds handling: the drum page's handling and storage block (lagging and its estimated mass, the rules for lifting, transport, storage and payout, HD 620 for MV kinds, return terms, ISPM 15) for the first drum of the answer, every line with its sources; each fit (or pool row) also carries its own handling: lagging, gross mass, bolt torque, rules, HD 620 barrel and return terms. | |
| reeling | No | A motor-driven reeling drum (crane, mining machine, festoon reel) for a flexible cable: cylindrical (ventilated, wide flanges), radial-vent or radial-closed (spiral). Adds reeling: the NFPA 79 (2024) Table 12.7.3 factor on the cable's current rating and the drum rules of 13.4.3.2. | |
| handling | No | 1: the handling block with lagging none. | |
| material | No | With D, d and W: the drum's material for the handling block (default wood). | |
| allowance | No | Wound diameter over OD. Default 1.05. | |
| freeboard | No | Freeboard to the flange rim, mm. Default max(50 mm, one wound diameter). | |
| free_height | No | With D, d and W: a part-used drum, the height measured from the flange rim down to the top of the cable, mm. Gives the length left on it as a range (the top layer may be part wound). |