Okay, Tim, that sounds like a frustrating situation. Let's break down the issues, focusing on the transformer and service sizing, and then address the other issues you're having with the electrician.1. The 15KVA Transformer and the 125A Service Transformer Capacity

A 15KVA transformer can only safely supply a certain amount of current. To calculate the maximum theoretical current at 240V (typical for a single-phase residential service), you use the formula: `KVA x 1000 / Volts = Amps` `15 KVA x 1000 / 240V = 62.5 Amps`This means a 15KVA transformer, on its own, can only support approximately 62.5 Amps at 240V.

Why 125A Instead of 200A? This is the crucial point. A 15KVA transformer cannot supply 200 Amps at 240 Volts. Installing a 200A breaker would be extremely unsafe. If your electrician did install a 200A breaker on this transformer the transformer would burn up the first time you tried to pull 200amps. The 100A Service

You mentioned it previously had a 100A service that was too small. However, a 100A service is too large for a 15KVA transformer, and this is likely why a 125A breaker was chosen for the new sub-panel.

In Summary

You're being limited by the size of the transformer. If you want a full 200A service, you will need to upgrade your transformer to a higher KVA. Otherwise the electrician made the correct call to install a 125A breaker for the sub-panel.

Recommendations Related to the Transformer & Service Size



Calculate Your Load

Accurately calculate the load you expect to have in your building now and also considering future expansion.

Oversizing

It's generally wise to slightly oversize the transformer and service to allow for future growth and to avoid overloading.

Consult with an Electrical Engineer

This is absolutely necessary now, especially considering the issues you've already encountered. An EE can assess your needs, calculate the required transformer size, and ensure the entire electrical system is safe and compliant.

2. Other Contractor Issues

These are serious safety concerns and indicate a lack of quality workmanship.

Loose Connections (Main Leg and Grounds)

This is completely unacceptable. Loose connections are a major fire hazard and can damage equipment. They also indicate a general lack of attention to detail.

Ground Rod

The ground rod sticking out is both a physical hazard and indicates improper installation of the grounding system. The loose clamp is another grounding fault.

PE Sign-Off

The electrician should have informed you about the requirement for a professional engineer's (PE) stamp, especially for a service change. This is often a requirement for permitting and inspection.

Panel Defect

A manufacturing defect in the panel is something that needs to be addressed with the panel manufacturer.

Recommendations Regarding the Contractor Issues


IMMEDIATE ACTION: Disconnect Power and do not use the building until the panel is evaluated by a qualified electrician or engineer to ensure it is safe.2. DOCUMENT EVERYTHING

Take photos of all the issues (loose connections, ground rod, etc.). Keep records of all communication with the electrician.3.

DO NOT PAY THE REMAINING BALANCE (if any)

Withhold payment until the issues are resolved to your satisfaction (and that of an independent electrical inspector/engineer).4.

CONTACT YOUR LOCAL ELECTRICAL INSPECTOR

Report the problems to your local electrical inspection department. They can inspect the work and require the electrician to correct any code violations. This is the most important step to ensure safety and compliance.5.

CONSIDER A DIFFERENT ELECTRICIAN

Based on the issues you've described, it might be best to hire a different, more qualified and reputable electrician to correct the problems. Get multiple quotes.6.

LEGAL ACTION (Potentially)

Depending on the extent of the damage and the cost of repairs, you may want to consult with an attorney to explore your legal options.

Key Takeaways: The electrician was correct in not installing a 200A breaker on the 15KVA transformer. You need to determine the load requirements of your building to determine what size transformer and service you require. The other issues you've described are serious safety concerns and need to be addressed immediately. Prioritize safety and compliance. Get a second opinion and involve an electrical engineer.It's unfortunate you're dealing with this, but taking the right steps now will ensure the safety and reliability of your electrical system in the long run. Good luck. Flag for review