My EMF Safety Assessment found Extreme Concern magnetic fields and net current on the AC compressor circuit in this lovely Granite Bay California home so I came back with my EMF electrician to restore circuit wiring to comply with the National Electric Code (NEC).
The breaker for this circuit was OFF for all of this testing
An 8.4 mG magnetic field was measured at 3′ from the wall in the laundry room. We inspected the 240 VAC 40 amp air conditioning circuit at the outdoor HVAC disconnect box where we we observed .42 AMP net current on the pigtail to the AC compressor when the AC unit was OFF. This is circulating neutral current traveling on grounded metallic pathways: equipment grounding conductor and copper air conditioning compressor refrigerant lines.
Inside the HVAC shut off box we observed that the green equipment ground conductor from the AC compressor unit was illegally connected to the white neutral conductor of the circuit. This put neutral current onto the equipment ground which then put neutral current onto the AC compressor refrigerant lines and back into the house to the indoor FAU fan coil blower where the neutral current took several additional pathways creating additional magnetic fields around the house.
One single NEC violation can pollute a large section of a house with Severe & Extreme Concern AC magnetic fields.
The circuit to the HVAC cut off disconnect was a 4-wire: L1 red, L2 black, Neutral white and bare copper ground. Both the neutral & grounds were connected at the ground terminal in the case. This created a powerful net current and magnetic field even when the HVAC unit was OFF.
When we disconnected the white circuit neutral from the ground terminal bonded to the case, the net current, current on the HVAC refrigerant lines and related magnetic fields ceased.
Please note: NEC, National Electric Code, article 250.24(A)(5) states,
“Load-Side Grounding Connections.
A grounded conductor shall not be connected to normally non-current carrying metal parts of equipment, to equipment grounding conductor(s), or be reconnected to ground on the load side of the service disconnecting means except as otherwise permitted in this article.”
In short: neutrals and grounds must not be connected at any location other than the Service Entrance panel. The reason for this is to keep current off grounding conductors for shock & life safety reasons: grounding conductors or other metallic parts, like HVAC refrigerant lines, must never have any continuous current on them.
It is amazing that the building inspector did not see this visible NEC violation and require the building contractor to fix it before the house was sold. Sadly we see NEC violations like this in 25% of homes we inspect. It is a very false assumption to believe the a house meets NEC code and is safe just because it got a pass from the building inspector.
Does your house have violations of the national Electric Code? Find out for safety sake.
Virtually all wiring errors creating high magnetic fields are code violations of NEC Articles 250.24(A)(5), 250.142(B), and 300.3(B)(1). These NEC violations are a fire, shock and magnetic field health hazard. Certified Building Biologists, BBECs and Electromagnetic Radiation Specialists, EMRSs, use precision 3-axis magnetic field meters to detect, locate, measure and assign a biological risk level for magnetic fields. We also provide expert restoration of these violations to NEC CODE compliance.
For information on detecting, measuring and reducing dirty electricity, electric fields, RF radiation, Magnetic fields and exposure to other EMFs contact:
Eric Windheim, the founder of Windheim EMF Solutions is a certified Building Biology Ecology Consultant (BBEC) and Electromagnetic Radiation Specialist (EMRS). Eric provides assessments that will detect, measure and reduce sources of EMF radiation in your home, office, or business in the Sacramento, Northern California area and special assignments nation wide. Schedule an EMF Assessment with Windheim EMF Solutions Today – We Deliver Results! We are based in science and use nature as our model. Less EMF, Better Health, Live Longer.
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