GT Engineering performs analyses of Electrical Hazard based on what is required by the Article 80 of D.Lgs 81/08. We consider both the hazard of direct and indirect contacts and the arc flash hazard, using the methodology of NFPA 70E and the IEEE 1584 algorithm.
Is it permissible to install the switch disconnector on the door of an industrial control panel?
THE DOUBT
When analysing switchboards, we sometimes notice that the main disconnector-switch is installed directly on the door of the switchboard, instead of o...
Circuit breakers
Circuit breakers are meant to protect the circuit from overcurrents, which can be divided in two categories:
overload, i.e. a current that settles in...
Use of type B Residual Current Device
There is often confusion as to whether or not type B residual current devices are required to protect lines in which variable speed drives are used to control a...
Industrial control panels and the door Interlock
Is an enclosure interlocking required for industrial control panels? That is a strongly debated topic and not yet fully understood: let's cle...
Protection from direct contacts: IPXXB or IP2X?
THE QUESTION
On the electrical standard, we often read that the assemblies and/or the electrical equipments in general shall provide a degree protection against...
BS 7671: an introduction
BS 7671: 2008 is the National Standard for most electrical installation work undertaken in the United Kingdom.
It is also adopted by a number of other Countries...
Type G and residual current devices: what are the differences?
THE DOUBT
What are the differences between RCDs and Type G Ground Fault Protections?
CONSIDERATIONS
Among possible causes of electric shock the...
Lockout-Tagout Analysis
Hazardous energy related incidents is a generator of fatalities, in USA & Canada we talk about Lockout-Tagout and the reference USA standard is ANSI/ASSE Z244.1
Grounding of Industrial Generators in DG Systems
Currently the NEC in Article 100 defines the terms ground or grounded as connected to the earth or to some conducting body that serves in place of the earth
What colour is the neutral conductor according to EN 60204-1?
THE DOUBT: Most of us know that Light Blue is the colour of the neutral conductor inside an industrial control panel. The doubt is the colour of the &ldquo...
Shall a Basic Safety Standard be applied to machineries? The case of pink functional grounding cable
IEC 60204-1 VS IEC 60445: green-and-yellow functional grounding conductor VS pink functional grounding conductor.
...
Grounding and Bonding
The NEC often uses the term ground when it really means bond.Let's see definitions and let's see how to make things clear to understand better this standard
