Pads and transformer yards
Base, pad, and yard for pad-mount transformers. Associated electrical civil: leveling, anchoring, and hookup. Documented at Multi V Rosarito (750 kVA).
Who does medium-voltage work in Tijuana? Alianza Electromecánica, trade name of Luis Enrique Laija Pacheco (persona física), is a field contractor for pads, manholes, transformers, and CFE coordination. It is not Alianza Eléctrica and it is not a cable store. Office at Nicolás Bravo 2936, Col. Colosio Delmatamoros, CP 22204, Tijuana, B.C. Phone (664) 604-1810.
Field work: pads, manholes, MV boxes, transformers, trenches, and panels. CFE and IMMEX coordination. We are not a cable store or the retailer branded “Media Tensión”. Real photos on the portfolio.
MEP contractor · Not a supply house
We are Alianza Electromecánica, trade name of Luis Enrique Laija Pacheco (persona física), office at Nicolás Bravo 2936, Col. Colosio Delmatamoros, CP 22204, Tijuana, B.C. We execute medium voltage in Tijuana and Rosarito as a contractor: transformer setting, pads, manholes and MV boxes, trenches, ducts, and panels. Mexican NOM compliance.
A search for “media tensión Tijuana” often surfaces a cable and equipment retailer. That is not this page. We do not operate a store or a materials catalog. If your building or IMMEX plant needs a service entrance, transformer yard, or underground raceway, we quote the scope we can actually build — with CFE coordination when the contract includes it.
We support the developer or building contractor as the MEP and civil contractor: medium voltage, electrical installations, and HVAC. Quote at (664) 604-1810. English reports for nearshoring plants. US companies: MEP contractor for US companies in Tijuana.

Field scope
The difference versus a materials counter is the jobsite: excavation, pads, manholes, MV boxes, panels, and CFE coordination in Tijuana and Rosarito.
Base, pad, and yard for pad-mount transformers. Associated electrical civil: leveling, anchoring, and hookup. Documented at Multi V Rosarito (750 kVA).
MV manholes, sectionalizing boxes, and pull pits for underground raceway. Built and installed on site — not a box catalog.
Excavation, duct bank, and site raceway. Documented at Multi V Rosarito and FINSA El Salto (industrial park).
TAB GH / TAB GH2 panels and 480 V distribution on the low-voltage side. Startup in the same contract as the MV yard.
Service entrance and transformer-yard work with CFE when the scope includes it. Paperwork closes with the client or developer; we do not replace CFE.
MEP support for IMMEX plants installing or expanding in Tijuana: medium voltage + low voltage + HVAC, English reports for the US corporate office.
Scope of work
Pads, manholes, MV boxes, transformers, trenches, and panels for plants, parks, and clinics in Tijuana and Baja California.
Setting and hookup of transformers. Documented: 750 kVA at Multi V Rosarito; 300 kVA at Clínica REYMAR.
Pads, manholes, and medium-voltage boxes for underground raceway and transformer yards. Associated electrical civil work.
Excavation, duct bank, and site raceway. Documented at Multi V Rosarito and FINSA El Salto.
TAB GH / TAB GH2 panels and 480 V distribution tied to the MV side. Low voltage in the same contract.
CFE coordination when it applies, NOM field work, and English reports if the plant is IMMEX / nearshoring.
Medium voltage + electrical + HVAC in buildings under construction or fit-out. Support to the building contractor. The published scope is MEP fit-out and installations in existing buildings.
Same company, separate pages
Alianza Electromecánica is not Alianza Eléctrica (alianzaelectrica.com): that is a different company. It is also not the store that uses the name Media Tensión. This office is the trade name of Luis Enrique Laija Pacheco (persona física), Nicolás Bravo 2936, Col. Colosio Delmatamoros, CP 22204, Tijuana, B.C. Phone (664) 604-1810. Spanish page: media tensión en Tijuana.
The substation as a deliverable (transformer, panels, and CFE coordination when the contract includes it) is on electrical substations in Tijuana. This page is the field work: pads, manholes, sectionalizing boxes, trenches, and setting. The two pages link to each other and do not replace each other.
The only published transformer sizes are 750 kVA at Multi V Rosarito and 300 kVA at Clínica REYMAR. The site does not publish the service voltage of those jobs. There is no high-voltage work. CFE paperwork, when the contract includes it, closes with the client or the developer. Alianza does not replace CFE.
Contractor, not supply
In Tijuana, “media tensión” is also the trade name of a cable and equipment retailer. Alianza is not that company and we do not compete at a counter. We are the contractor that opens trench, pours the pad, sets manholes and boxes, installs the transformer, and leaves panels ready for 480 V — with jobsite photos, not catalog shots.
Coordination with CFE (service entrance, yard, release) and support to IMMEX plants enter when the contract asks for them. CFE paperwork closes with the client or developer; we execute the work that paperwork requires. For nearshoring plants, coordination and reports can run in English.
That does not mean we build the industrial building from start to finish. It means that, inside a plant or building, we close the electromechanical package: medium voltage when it applies, electrical installations, HVAC in Tijuana, and the civil items the electrical work needs (pads, manholes, boxes, trenches). The owner or the building GC keeps that building scope.
Evidence on the medium-voltage portfolio: Multi V Rosarito 750 kVA, FINSA El Salto, Otañez/Kenit, Clínica REYMAR 300 kVA, and Vance & Hines. To quote: WhatsApp (664) 604-1810 or the form. Include kVA, pad, manholes, CFE, or IMMEX plant.
Real jobs
Photos are from those jobs. More frames on the medium-voltage portfolio.

Medium voltage · Rosarito
750 kVA transformer, trenches, ducts, and TAB GH panels. Equipment yard and underground raceway.

Industrial park · El Salto
Raceways, trenches, and a planned future substation area in the industrial park.

Electromechanical · Kenit
Electromechanical work and corrugated ducts on site. Documented scope: ducts, not a pad-mount transformer on this card.

Healthcare · 300 kVA
300 kVA, low voltage, and HVAC. Two operating rooms per COFEPRIS.

Building · Tijuana
Production room: drywall, electrical, and finishes. Interior electrical and civil — not a transformer yard.
We do not claim pad-mount at Otañez or Vance & Hines: the portfolio shows the exact scope of each card.
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Luis Enrique Laija Pacheco, persona física