3-Phase Sub Panel Wiring

@leonidye

Hi, I can assist you with the design of a 3-phase sub-panel configuration for HVAC power distribution settings, as well as the creation of clear and code-compliant wiring diagrams. I possess extensive experience in commercial electrical systems, 208V Wye configurations, HVAC equipment power distribution, and the integration of sub-panels utilizing existing 3-phase feeder circuits. I will evaluate your existing Feeder #2 to determine appropriate breaker and wire sizing, and I will produce professional single-line diagrams that serve as essential references for planning and installation. My design approach prioritizes compliance with NEC regulations, balanced phase loading, accurate grounding and bonding, and the safe power distribution for two small-scale HVAC systems. If required, I can also provide recommendations regarding breakers, overcurrent protection devices, labeling, and panel layout. The final deliverables will include detailed technical drawings and clear documentation, enabling your electricians or contractors to proceed with the installation seamlessly. I am available to begin work immediately and can promptly deliver accurate, professional-grade electrical documentation. Regards.

@AwaisChaudhry

Hello, Understanding: You want to repurpose a 3-phase #2 circuit from a roof package unit to feed a small 3-phase sub panel, configured in wye, operating at 208V, with two HVAC systems. Approach: I will deliver a detailed line drawing for planning that shows the sub panel location, conductor sizing, protective devices, transformer considerations, and wiring routes, while ensuring all work meets current electrical codes. I will base the design on a clear understanding of your 208V 3-phase system, provide step-by-step wiring diagrams, and include practical notes for field installation. What is the exact available ampacity on the existing 3-phase circuit and main panel rating? Questions for you: What is the exact available ampacity on the existing 3-phase circuit and the main panel rating? Are there any feeder protection or grounding requirements at the sub panel per local code? What is the distance between the existing feeder and the proposed sub panel location? Do you have a preferred sub panel enclosure type and enclosure grounding method? Will the two HVAC loads be balanced, and do you have their current/starting amperage specs? Is there space for future expansion or additional loads on the sub panel? Are there any existing wiring corridors or conduit constraints we must follow? What are the required labeling and data plate details for the sub panel and breakers? Do you have any site-specific commissioning or testing procedures to include in the deliverables?

@manusharma2992

With over blank years of experience in electrical engineering, I am well-versed in all elements of the 3-phase systems you require for your project. My firm understanding of circuit design, paired with my proficiency in creating technical schematics, will ensure that your sub panel is configured correctly in a wye as per your need. I also promise to provide detailed line drawings that comply with all relevant electrical codes, to guarantee safe and effective use of your small HVAC systems. In closing, along with offering a comprehensive knowledge of three-phase systems and effective problem-solving techniques honed throughout the years, I'm passionate about delivering high-quality work that withstands time. When we collaborate on this project, expect nothing less than impressive designs that amplify the functionality and longevity of your new sub-panel wiring system. Let's make sure this upgrade not only serves its immediate purpose but remains positioned for scalability if required in future expansion plans. Can't wait to get started!

@Feriver

Hello, I understand you need help repurposing an existing 3-phase #2 feeder currently serving a roof package unit into a new 3-phase sub panel configured in wye to supply two smaller HVAC systems operating at 208V, while ensuring proper planning and electrical code compliance. I will prepare a clear single-line wiring diagram showing the transition from the existing feeder to the new sub panel, including proper phase distribution, grounding, and protection layout. I will also define the panel configuration for balanced load distribution, HVAC circuit separation, and safe integration of both systems, ensuring the design aligns with standard electrical codes and practical installation requirements. The deliverables will include a professional schematic drawing suitable for contractor execution, a simplified panel schedule, and a structured reference document outlining connections and safety considerations. I can ensure a clean, readable design ready for field implementation and coordination with your electrical team. You can also view my portfolio here: https://www.freelancer.com/u/Feriver Thanks, Asif

@eslamsaeid1991

Hello sir, As a Senior Electrical Power Systems Engineer, I specialize in high-overhead infrastructure retrofits, 3-Phase Power Distribution Planning, and strict NEC (NFPA 70) Code Compliance. I will lead the engineering to safely repurpose your existing rooftop package unit circuit into a dedicated distribution hub for your two new HVAC systems. Technical Scope & Deliverables: Summarized as the production of an Accuracy-Verified 3-Phase Single-Line Diagram, a Conductor Ampacity & Voltage Drop Audit, and a Code-Compliant Grounding/Bonding Scheme. I provide Smart-Layered technical layouts and Executive-Level calculation summaries optimized for Permit Submittal and Zero-Error electrical installation. Engineering Goal & Impressive Solution Repurposing a 3-Phase #2 AWG Copper Circuit via a 208Y/120V Subpanel. The core engineering challenge when transforming a dedicated motor/compressor branch circuit into a feeder for a downstream subpanel is ensuring a continuous, code-compliant path for neutral and grounding currents, alongside proper overcurrent coordination. A #2 AWG THHN Copper circuit provides an allowable ampacity of 115 Amps under the 75°C terminal temperature column (NEC Table 310.16). My solution utilizes a 4-Wire + Ground Wye Configuration. Regards, Eslam

@mahmoudralizadeh

Your concept combines two important design challenges: integrating a visible 360° LED lighting path while keeping the armband comfortable, stable, and athletic during motion. The enclosure architecture around the 58 × 42 mm electronics module will be the key to achieving both durability and wearability. My approach would be: 1. Develop several wearable concepts (semi-rigid band, hybrid TPU strap with rigid spine, and modular electronics housing). 2. Integrate the LED diffuser into a protected perimeter channel for maximum visibility. 3. Create realistic renderings to evaluate styling, ergonomics, and nighttime appearance. 4. Optionally develop CAD models suitable for 3D-printed prototypes and future manufacturing refinement. I have extensive experience in mechanical product development, CAD modeling, and design for prototyping, including housings for electronics and wearable-style assemblies. Deliverables can include concept sketches, high-quality renderings, and optional STEP/STL files, with up to two revision rounds. Scope is based on the current description. Additional features or engineering beyond the agreed concept phase can be quoted separately. No physical fabrication or testing is included unless explicitly agreed. Preliminary timeline: 5–8 days, to be confirmed after reviewing your reference images and prototype photos. Do you already have preferred materials or attachment methods for securing the armband during running and cycling?

@engrhasan01

Are you looking for an electrical engineer to repurpose the existing 3-phase feeder into a correctly configured 208V wye subpanel for supplying two HVAC systems, with clear planning drawings and code-compliant design? I’m an Electrical Design Engineer experienced in commercial power distribution, 3-phase systems, and HVAC electrical coordination. I can review the existing feeder arrangement and prepare the required technical documentation. Scope I Can Support • Existing feeder assessment • 3-phase subpanel integration • 208V wye configuration • Load balancing review • Breaker/feed sizing • Code-compliant line drawings Deliverables • Single-line diagram • Subpanel wiring drawing • Load distribution notes • Breaker recommendations • PDF + editable source files I can also help check whether the existing #2 feeder capacity is sufficient for both downstream HVAC loads and identify any NEC-related considerations before installation. Best regards, Hasan

@kashifsani

Dear Sir, Please contact me to get started. Thanks. I am an Electrical Design Engineer having 17+ years of experience in Design of Electrical System for Residential and Commercial low/high rise buildings. I will provide all aspects of Electrical System for your project as per standards (NEC or any local if any) and specification within the required time and budget. Well versed in; 1. Lighting Layouts 2. Power Layouts 3. Single Line Diagram 4. Fire Alarm System 5. ELV (Subject to Client’s requirement) 6. Lighting Protection System 7. Design Calculations 8. Equipment Installation Detail Drawings. 9. Take-off sheets and Bills of quantity 10. Technical Specifications and more.

@sakshis576

As an electrical engineer in a world of 3D design, circuit design, and several other software sets, I’m a great fit for your project. Over the years I've accumulated the skill and experience you need to repurpose your 3-phase #2 circuit effectively, transforming it into a small 3-phase sub-panel that will properly feed two smaller HVAC systems operating at 208V. Does your project require a detailed line drawing for planning? Or ensuring compliance with all electrical codes? I assure you that these deliverables and more are well within my areas of expertise. Not only am I comfortable with designing and calculating electrical systems, but I am also adept at creating technical schematics. This means that not only will your project be done to code, but it will also be easily reproducible if needed.

@Zack111Arya97

​Hi, I am Zakaria. As a Master’s graduate in Automatics and Systems, I specialize in the design and optimization of industrial electrical networks and control systems. I have extensive experience in power distribution, ensuring that 3-phase circuits are balanced, safe, and fully compliant with engineering standards. ​Why I am the best fit for this sub-panel integration: ​ 1. Three-Phase Network Design: I am highly proficient in 208V Wye configurations. I will ensure the neutral and ground paths are correctly established from your existing #2 circuit to provide stable power to your two smaller HVAC units. ​2. Technical Schematics: I will provide a detailed line drawing (One-Line Diagram) including wire sizing, breaker ratings, and grounding details. This documentation will be clear, professional, and ready for your planning and permit review. ​3. Code Compliance: I prioritize reliability and safety. I will verify that the #2 copper/aluminum ampacity is correctly matched to your new sub-panel’s OCPD (Overcurrent Protective Device) and that the voltage drop remains within acceptable limits for HVAC operation. 4. ​Industrial Precision: My background involves managing complex electrical installations in industrial environments, ensuring that every connection is documented and every load is balanced across the phases. I am ready to help you repurpose your existing infrastructure into a reliable, code-compliant distribution point.

@karimabdellah

Hello! I am Karim Mahmoud, an Electrical Engineer. I will provide the detailed line drawing and sub-panel configuration for your 208V Wye system, ensuring it meets all safety codes. ​One quick question: What is the total load (Amps or Tons) for each of the two HVAC units to ensure the #2 circuit is sized correctly?

@jowayne77

Hello, Having worked in the building construction industry for over 7 years, I have not only designed structural plans but also become proficient in using electronic drafting tools like AutoCAD and REVIT. This expertise extends to creating technical schematics, which will be essential in delivering the detailed line drawing for your sub panel project. With my background in electrical engineering, I'm well versed with 3-phase systems and can guarantee a configuration that complies with all electrical codes. Moreover, my experience with both residential and commercial projects equips me to handle your dual-purpose HVAC requirement seamlessly, whether it’s drawing power through the existing 3-phase circuit or ensuring they operate at the designated 208V voltage. I truly understand the complexity and importance of such a task and can promise you top-notch service with keen attention to detail. In essence, my unique blend of structural design and electrical engineering skills positions me strongly for this project. I approach every task as an opportunity to exceed expectations and deliver excellent results. Embrace the chance to rely on a seasoned professional like myself to solve this niche problem for you. Thanks!

@lilyb61

Hi, I’m Lily. I specialize in electrical system design and can help repurpose your existing 3-phase #2 circuit to feed a small 3-phase subpanel for your two HVAC systems. I will design a Wye-configured subpanel suitable for 208V operation, ensuring all wiring, breakers, and connections are code-compliant. Deliverables will include a clear, detailed line drawing for planning and installation, showing precise connections from the existing circuit to the subpanel and onward to each HVAC unit. I will ensure all overcurrent protection, phase balancing, and grounding meet NEC standards, providing a practical, safe, and reliable solution. With experience in 3-phase systems and technical schematics, I focus on clarity and usability so that the drawings are easy to follow on site. I will also provide notes and recommendations for installation to minimize field issues. My goal is a professional, ready-to-use design that integrates seamlessly with your existing electrical infrastructure.

@davidp016

Hi I am an experienced electrical professional with a strong background in commercial 3-phase power distribution, HVAC systems, and panel integration. I can assist with repurposing the existing 3-phase #2 circuit into a properly configured 208V wye-fed sub panel for the two new HVAC systems. I will provide a clear and detailed line drawing for planning and installation, while ensuring the design aligns with applicable electrical codes and practical field considerations. My experience includes load calculations, panel sizing, breaker coordination, and HVAC power distribution in commercial environments. I would be glad to review the existing setup and help develop a safe, code-compliant solution. Best regards,

@anastasiiab37

Hi, I hope you're having a great day. I have hands on experience repurposing service circuits and configuring 3 phase panels, having delivered several similar builds. I recently redirected a single 3 phase #2 feeder into a wye sub panel to feed two HVAC loads, redrawing bus connections in AutoCAD and correcting neutral sizing for 208V. I'd usually start by reviewing the existing panel photos and measuring conductor lengths, then sketch a schematic in AutoCAD and check grounding and neutral separation per NEC. Quick load calculation first. If you have ten minutes, I'd like to compare notes on the existing feeder routing and the intended breaker sizes so I can lock the line drawing. Thank you, Ana

@oscarj49

✅✅✅✅ We value safety, precision, and code-compliant electrical system design. ✅✅✅✅ Hello, I have carefully reviewed your project requirements and fully understand that you need assistance repurposing an existing 3-phase #2 circuit from a rooftop package unit into a properly configured 3-phase subpanel to supply two smaller HVAC systems operating at 208V wye. With experience in 3-phase electrical distribution, HVAC power systems, and technical schematic development, I can help create a clear and code-compliant design suitable for planning and implementation. I can help deliver: ✔ Detailed single-line and panel distribution drawings ✔ Proper 208V wye configuration planning ✔ Load distribution review for the two HVAC systems ✔ Subpanel feeder and breaker sizing guidance ✔ Grounding and neutral configuration review ✔ NEC-focused code compliance considerations ✔ Clear technical documentation for installation planning I understand the importance of safe load balancing, proper phase configuration, and ensuring the upgraded distribution setup remains reliable and compliant for HVAC operation. I would be happy to review the existing circuit details, panel specifications, and HVAC load requirements to prepare an accurate and professional schematic package. Thank you for your time and consideration.

@leonards37

Dear client. Expert HERE If you decide to work with me, we can start working immediately. Let's start! Looking forward to hearing from you soon. Best, Regards, Leonard

@mandir1

Hi! I’m an experienced electrical designer with a strong background in 3-phase power distribution and HVAC electrical systems. I can help repurpose the existing #2 3-phase circuit into a properly configured 208V wye sub panel feeding your two HVAC systems. I’ll provide a clean and detailed line drawing along with code-compliant planning details to support installation. Looking forward to working with you!

@riob39

Hello, I’d be glad to assist with your HVAC electrical project. I have experience designing 3-phase distribution layouts, sub panels, and HVAC power systems, including 208V wye configurations. I can deliver professional line diagrams, load considerations, and code-compliant planning documentation for your installation. Let’s discuss the project details!