GBTorpenhow...thanks for your response.
ASH actually comes from API RP 14C, Table 1. Oddly enough API RP 14C, section 4.2 is their support of the use for "S" as "Safety". As you surmised, the gas detectors do return the %LEL or PPM as an analog value but gas detectors can be purchased with...
DM2 (Mechanical)(OP)25 Jan 24 00:09
I'm trying to understand ISA 5.1, Table 4.1 as it might apply to a Gas Detector.
Normally I see a gas detector tags as "ASH..." I've been told that the "S" is for "Safety" and the "H" is for High.
Table 4.1, "A" Column 1 is = Analysis (4-20mA...
The NEC has requirements for electrical installations in normally "Damp" or "Wet" locations.
I'm trying to find out if NFPA 13 would require a space, that's normally not considered Damp or Wet (i.e. indoor) to use Weatherproof enclosures.
The system being installed is a watermist system per...
I'm trying to figure out what, when I connect to a device to read Modbus data over TCP/IP, Moscan64 always shuts down.
It's been a while since I connected to a PLC via MODSCAN64 via TCP/IP, but as I remember when using MODSCAN32, I would first Identify the IP address of the PLC, and set my...
sorry for the late reply...These days when you order something on Amazon, you tend to think it will be here in a day or so. I ordered the breaker and it took 3 weeks to get to me. I could have gotten it from our companies electric supplier, but they wanted $30+ dollars and Amazon was $13.
In...
Keith,
Thanks for your input...appreciated.
Regards,
DM
"Real world Knowledge isn't dropped from a parachute in the sky but rather acquired in tiny increments from a variety of sources including panic and curiosity."
Steve...that's not answering my question. I'm wanting to know what could happen if you didn't have the indication that the panel had a ground. As I understand it, a single ground may not be an issue, but multiple grounds could cause problem. Essentially...what's the justification for...
I'm trying to better understand the potential consequences of a ground fault on a 24 VDC floating power supply, similar to that used for a fire alarm panel.
In my mind I'm guessing that if the circuit is grounded (and lets say your ground fault detection isn't working) there is the potential...
Itsmoked...thanks for your response...
I searched Home Depot and the website says there are none in my locations. I could go to the company we buy our electrical stuff from, but I ended up ordering it on Amazon and it will be here on Tuesday.
In terms of Name Brand GFIC's, I would agree. When...
I've read a number of recommendations not to connect a Laser printer to a UPS (CyberPower - Can I connect My UPS to a Laser Printer as it can damage the UPS.
itsmoked - I did connect a clamp meter to the circuit at the breaker which is how I determined the load with and without the printer...
3DDave There are other things on the circuit (2 lighting Circuits, several outlets with nothing plugged in, and a ceiling fan). I've resorted to turning those off when I start the printer. I measured the load using a Clamp Meter and the all the circuits off...then again with the printer...
I have a copy/printer (Konica Bizhub C220) that I got during COVID to be able to work from the house. I needed something to print in color and scan 11 x 17 drawings.
The unit is plugged into a wall outlet. The wiring to the breaker will support 20 Amps, but the original breaker was a 15 Amp...
I was playing around with inserting a company logo into the header of MS Project 2016. This feature isn't as handy in Project, as it is in Excel, which allows you to scale the image.
The image I inserted is the same that i've inserted in Excel, with ends up being about 7" wide by about 2"...
First, thanks for everyone's input. I’m a mechanical engineer so forgive my ignorance on some of the comments. Most of what I Google on the Internet is about making communications circuits bullet proof, when what I want to do is break them.
Catserveng…
So you took the wire from the Varac and...
I want to train some technicians on the use of an Oscilloscope for trouble shooting electrical interference on communication circuits. I'd like them to see real world examples of what noise looks like and what capacitance does to the communication signal. The communications circuit would be...
IEC 60890 uses a series of graphs as part of the temperature rise calculations. I've been looking for either a spreadsheet, or equation to incorporate into the calculations rather than a graph.
Anyone know of a spreadsheet, or the equations used to plot the graphs?
Regards,
DM
"Real world...
Ya learn something new every day.
Regards,
DM
"Real world Knowledge isn't dropped from a parachute in the sky but rather acquired in tiny increments from a variety of sources including panic and curiosity."
NFPA 70 is an installation standard. Where it would apply to your application is more to do with how someone is going to install your product. Your manufacturing needs to consider this.
UL 508 is the construction of enclosures. UL 508A is the assembly of components in the enclosure. There...
The reason it doesn't need to be shielded is that there is enough noise immunity built into the system, such that if you following the wiring requirements in the manual, along with NFPA 70, Article 760, there is not need.
I'm not sure where this comes from, however if you're going to use...
I'm guessing you may be from the other side of the pond?
I would start by looking at it from your side of the world and see what standards you would apply locally. If you've built something similar in your country, ask the Notified body if they know what the equivalent US standards might be...
