Applying quotas to copper wire in conduit: distinguishing "lighting" vs "power" wire-pulling sub-items (<=4 mm2 classified by use; Beijing 2024 C4-11-284/C4-11-288 compared)

Topic Positioning

The classification rule between "lighting" and "power" wire-pulling sub-items in conduit-wiring pricing. Taking the 4 mm2 tier: in Beijing 2024 this section appears in both tables (overlap tier), so attribution depends on circuit use, not the section itself. For quota-classification disputes in electrical wiring pricing and review.

Core Conclusions

1. Classification principle: by use, not section alone. The prevailing Q&A wording: "Wires <= 4 mm2 for lighting and similar uses take the lighting-wire quota; wires for power, or lighting circuits > 4 mm2, take the power-wire quota. Socket wiring above 4 mm2, whether power or lighting, uniformly takes power wiring... Socket wiring below 4 mm2 in ordinary housing takes lighting wire-pulling." (From an adopted expert answer on a cost platform — a practical consensus, not an official document.) In sum: <= 4 mm2 lighting and similar (including ordinary 220 V socket circuits) -> lighting; power use or lighting > 4 mm2 -> power.
2. Beijing 2024 (DB11/T 2382-2024 Appendix C) table structure: lighting Table C.4.94-1.1 covers 1-4 mm2, the 4 mm2 sub-item C4-11-284 "copper wire in conduit, lighting circuits, section within 4 mm2"; power Table C.4.94-1.2 starts at 4 mm2 (to 240), sub-item C4-11-288. Unit m. Identical work content: "pulling fish tape, cleaning conduit, talc, paying out, pulling, marking, soldering/crimping lugs, etc." Consumption comparison at 4 mm2 (per m):

Item	C4-11-284 lighting	C4-11-288 power
Composite labor class II	0.0050 workdays	0.0050 workdays
Insulated wire	1.1600 m	1.0500 m
Acetylene	0.0013 kg	0.0010 kg
Plastic tape 25 mm x 10 m	0.0025 rolls	-
Self-adhesive tape 20 mm x 20 m	-	0.0080 rolls
Black tape 20 mm x 20 m	0.0013 rolls	0.0040 rolls
Copper lug 185	0.0010 kg	0.0010 kg
Other materials / tools	3.0000% / 3.0000%	3.0000% / 3.0000%

3. Local standard corroboration: SJG 181.7-2024 Clause 6.1.2: "Lighting-circuit conductors of section >= 6 mm2 execute the corresponding power-circuit wire-pulling sub-items." Conversely, < 6 mm2 (including 4 mm2) lighting circuits take lighting sub-items.
4. Beijing 2024 text 6.4 (electrical equipment installation) has no explicit lighting/power split clause for wire pulling, only Clause 6.4.26 "distribution boxes/panels installed without distinguishing power and lighting". Mis-tabled costs differ little, but it is a "wrong application" in review — attributing by use is safest.

Applicable Boundaries

• Item 1 is a national practical consensus, not official; in settlement disputes support with circuit-use descriptions and the local cost station's interpretation.
• The "above/below 4 mm2" boundary is the source of such disputes; the mainstream reading includes 4 mm2 in the "<=4 lighting" tier.
• Workshop sockets, sockets feeding power equipment, and three-phase sockets are power; fire-alarm wiring is generally not power circuits.
• The consumption table maps only to the Beijing sub-items; other regions follow their own standards.
• This card is a pricing practice reference, not a substitute for the contract, drawings' circuit definitions, or the final review caliber.

Further Reading

• DB11/T 2382-2024 Appendix C: Tables C.4.94-1.1/1.2, sub-items C4-11-284, C4-11-288; text 6.4.
• SJG 181.7-2024 Clause 6.1.2.
• Q&A source: Glodon Service New GX answer "how to distinguish power and lighting wires in electrical wiring": https://www.fwxgx.com/questions/1268941
• Beijing Municipal Housing and Urban-Rural Development Commission notices (Beijing pricing basis verification): https://zjw.beijing.gov.cn/bjjs/gcjs/jzjnyjcjg/tzgg/543399172/index.shtml