JP rural grid combination boxes
- All-in-one: metering + distribution + correction + surge protection in a single box, pole- or column-mounted
- Branch circuits: irrigation wells / lighting / receptacles, each with protection and residual current protection
- Correction: small-capacity staged automatic switching, cosφ compliant at full load during irrigation season
- Surge protection: incoming SPD + proper grounding terminals, essential for open field locations
- Enclosure: stainless steel / hot-dip galvanized, outdoor IP54, optional anti-condensation heater
Specifications
The table below covers 80% of factory distribution room cases. Anything outside it we can still build — those are engineered items, quoted separately, with an indicative price the same day.
| Enclosure type | Pole-mounted / column-mounted (bracket mounting), floor-standing optional |
|---|---|
| Standard dimensions (W×H×D) | 700×1000×300 to 900×1300×350 mm, custom sizes available |
| Enclosure material | 304 stainless steel / hot-dip galvanized steel with powder coating |
| IP rating | IP54 (outdoor rain and dust protection), double-layer gasket door seal |
| Door and lock | Metering compartment and line compartment with separate doors and locks, sealable |
| Moisture-proof | Optional anti-condensation heater (for fields with large day-night temperature swings) |
| Rated voltage | AC 380/220V, 50 Hz |
|---|---|
| Metering position | Meter positions and CTs reserved per utility requirements (meter verification seals are the utility's responsibility) |
| Outgoing branch circuits | Irrigation well pump / lighting / receptacle, 3–6 circuits, 30 mA ground fault protection included |
| Power factor correction | Small-capacity 4–8 kvar group automatic switching (set for irrigation load characteristics) |
| Surge protection | Incoming line SPD Type 1 / Type 2, grounding terminals clearly labeled |
| main breaker | Isolator + breaker, visible break point |
| Component brands | Chint / Delixi / Schneider, customer-supplied units accepted for factory installation |
| Irrigation well type | One box per well: well pump branch + metering + compensation |
|---|---|
| Distribution transformer area integrated type | Pole-mounted integrated box for transformer area, separate lighting and power circuits |
| Greenhouse type | Greenhouse zone distribution + ground fault protection + surge protection |
| Rural lighting type | Village road lighting and public facility power supply |
| Field maintenance type | Added maintenance receptacle branch for temporary power during peak farming season |
| Assembly standard | GB/T 7251.1 / IEC 61439-1 |
|---|---|
| Ground fault verification | Circuit-by-circuit ground fault trip test (30 mA), verified unit by unit |
| Ingress protection verification | Outdoor box door seals and cable glands inspected unit by unit + batch spray test sampling |
| Routine tests (every unit) | Insulation resistance, dielectric withstand, branch and compensation switching powered test |
| Documents with shipment | System diagram, CT ratio table, terminal table, BOM, test report |
Five steps to specify your run
A configuration summary is generated as you go. It travels with your inquiry, saving a round of confirmation.
Build details
Systems have been in service for decades, and the failure points are always the same few: poor busbar contact, water ingress at the door seal, high temperature rise in the correction cabinet, and mis-phased outgoing feeders. The six hard rules below are written for exactly these points — every cabinet can be traced to them.
Separate compartments for metering and line circuits
Metering and line compartments have separate doors and locks: the utility seals and accesses the metering door, property maintenance uses the line door — clear responsibility, no crossover.
30 mA mandatory in the field
In wet field conditions, 30 mA ground fault protection is mandatory on every circuit: a cracked pump cable will trip faster than a person can get shocked — this is the baseline for rural electrical safety, not an option we sell.
Two-stage SPD in open areas
Open fields see dense lightning strikes: incoming-line SPD plus reliable enclosure grounding (grounding terminals and labels placed up front). After a strike, inspect the SPD degradation window — if it has failed, unplug and replace.
Set to irrigation and drainage load profile
Full load during irrigation season, light load off-season: compensation is set with fine-grained group switching — no reverse feed at light load, target power factor at full load. Controller parameters are written into the handover documentation based on the load curve.
All welds and openings sealed
Stainless steel enclosure welds are ground and sealed, and every opening uses a cable gland: moisture and agricultural chemical vapors in the field get in fastest through holes and seams — nothing is cut short here.
Pole number is the box number
Enclosure numbers correspond to the distribution-area pole numbers, and label plates are reflective, so utility crews can find the box by pole number without digging through records.
Photos & enclosure construction
Below are photos taken in our own shop — from the complete unit down to the internal busbars and secondary wiring. Every build detail can be checked item by item.
Image key: 01–05 are shop photos (the numbers match the shot list). The line drawing shows the front elevation of the enclosure; dimensions match the specification table above.
Where these cabinets go
These are the routine applications — we can talk scheme and configuration directly. For the industry view, see the industry pages.
Irrigation well pump
One box per well: metering, protection and compensation in one unit.
Distribution-area integrated distribution
Pole-mounted integrated cabinet for transformer district.
Greenhouse and agricultural park areas
Power distribution + ground fault protection + surge protection.
Village roads and public lighting
Lighting branch circuits with timer control.
Temporary power for farmland
Maintenance socket branch circuits for power take-off during peak farming season.
Outdoor livestock farm
Stainless steel + IP54, built to withstand washdown environments.
Commercial terms
Specification dated September 2026; quotations follow this.
| Drawings & design | Free |
| MOQ | 1 unit (5 or more recommended for production) |
| Production lead time | 15-25 days after drawing approval |
| on-time delivery | 98% |
| Warranty | 12 months |
| Loading port | Ningbo / Shanghai, China |
| Component brands | Schneider / ABB / Siemens / Chint |
| Factory visit & dispatch confirmation | Factory visits welcome; finished-cabinet photos and video before dispatch |
| Capacity | 5,800+ units / year |
Documents for your engineering team
Selection manual, outline dimensions and RFQ checklist — for the customer's electrical engineer. All three documents are being organized by product line; download links go live once complete.
Six questions procurement and electrical engineers ask most
Do you supply the meters inside the JP cabinet?
Metering and calibration seals are the utility's responsibility. We provide the meter positions, current transformers and secondary circuits, with cutouts and barriers per the local utility's cabinet specification — JP cabinet specs vary from county to county, so send us your local standard for verification before ordering.
Is pole mounting secure?
Pole clamps are supplied to match concrete or wood pole specifications, with a reinforced back panel on the enclosure. Wind load is calculated per local meteorological conditions. Installation is done by a licensed electrician (installation instructions and pole clamp list included), or we can guide you remotely.
What if the power factor falls short during irrigation season?
Pump banks draw heavy inductive reactive power at full load. In-cabinet compensation switches in automatically by group (switching delay set to match pump starting characteristics), holding cosφ above 0.9 through irrigation season. If you have an existing cabinet that falls short, send us the transformer capacity and pump ratings and we will calculate the compensation gap.
How does it handle lightning strikes?
Two-stage SPD plus enclosure grounding terminals (grounding resistance installed per local requirements) — in open field locations this is essential protection. The SPD uses replaceable modules: when the degradation indicator window changes color, swap the module instead of the whole cabinet.
Stainless steel or galvanized — which should I choose?
For coastal areas, livestock farms or heavy agrochemical exposure, choose 304 stainless steel (service life more than double). For inland general agricultural areas, hot-dip galvanized with powder coating is sufficient and saves about 30%. We specify based on site conditions and won't push the expensive option.
How many wells can one cabinet serve?
Based on pump rating: typically 4–6 branch circuits, one well per circuit (7.5–15 kW is common), with total capacity calculated against the transformer and incoming breaker. For districts with scattered wells, we recommend one cabinet per well so a fault doesn't take down the others.
Other cabinet types in the same main circuit
Related products use color-block placeholders for now (product photos not yet complete; they will be replaced together). Internal links will be filled in once live URLs are confirmed.
Send us your district parameters and we'll build the JP cabinet to your local code
Send us your transformer capacity, well count and local utility code — free JP cabinet design · quote within 24 hours. Direct from the factory, MOQ 1 unit, 15–25 day delivery, 1-year warranty.
ISO 9001:2015 · CE(LVD+EMC) · CQC · IP65
When you write, include: single-line diagram or primary scheme, switch room layout, load list, and component brand requirements. You do not need complete drawings — capacity and cabinet type are enough to start.