Thanks to all who responded. We have replaced the bolts & insulator material inorder to allow immediate requirements to run one or two motors. Local arcing has taken a toll on the square bolt holes and surrounding areas. At least one section of copper will likely be replaced prior to final...
We discovered two out of three riser bus bars (600 Amp) had lose bolts to the main bus (1200 Amp). The joint evidently was hot enough that the MCC skin was too hot to touch. The result is discolored copper in the small area where two bolts join each riser to the main bus. The only load...
I am about nine months from beginning an effort to grow hydroponic herbs and tomatoes. I noticed that the supermarket prices are higher if the tomatoes are labeled greenhouse or hydroponic. It appears that there are a number of variables which are very important to maintain, and the result is...
Further to my description:
TNT equivalents have been used in other applications for "relative" comparison purposes. Nuclear bombs is the obvious; and as I recall, the Apollo space program used "TNT equivalent" to have a uniform scale for the explosive potential for all...
Can anyone advise a simple relationship between the energy released in an electrical fault and the equivalent TNT explosive force?
For a specific example: if a 1,500 kVA transformer primary voltage 11 kV, has a fault which is cleared in 1 second, and the worst case fault current is 27. kAmps...
DonLeffingwellPE,
A number of years ago my beautiful wife was holding the faucet as she stepped into the tub and received a tingling shock. I grabed my meter and measured 40 V from the water to the metal faucet! Further checking showed an imbalance between the two 120 V incoming lines. The...
