The purpose of the consignment according to NFC 18-510 is to de-energize the area of the installation or equipment on which people are going to carry out electrical work. You have to: turn off the power, and ensure that this condition is certain.
Information from the various parties involved is not strictly part of the documentation. However, it is necessary. An inventory of energies other than electrical is necessary, including residual energies: Energy sources must be recorded (contact the operator for specific procedures), and residual energies must be dissipated (contact the operator for specific procedures)
An Intervention Officer can carry out a summary conviction if: he has a permanent view of the organ of separation, and his body can form a marker, due to the size of the intervention area.
Pre-identification - Separation - Conviction - Identification - Identification - VAT + MALT/CC - Consignment certificate
Separation must be certain.
It must be carried out by a disconnector:
- Switch off all active conductors including the neutral
- Visible separation (or by safety switch)
It concerns all the energy inputs to the structure (and the residual energy components if one wishes not to discharge them).
Attention, a disconnector does not generally function as a switch. In other words, sectioning must not be carried out under load (risk of arc formation).
Specific separations are also valid:
- Bridge removal,
- Fuse removal,
- Removing power sockets
The condemnation in the open position must be reliable:
- Realization of a mechanical lock
- Sign or display indicating the conviction: Prohibition of unconsignment, name of the consignee, date of deposit, others (Object, identification of the work,...)
The main objective is to avoid re-commissioning by a third party who is not aware of and/or unaware of electrical dangers.
The purpose of identification is to ensure that we have properly condemned the work on which we are going to carry out the work. V.A.T. is not reliable in doing this.
This identification is carried out by:
- Knowledge of the place
- The consultation of electrical diagrams, layout and other documentation
- The verification of cable and equipment markings near the lock and near the structure
- Visual monitoring of the cables if possible.
The identification is formalized:
- by signs on the structure itself
- by delineating the work area
Considerations will be made to eliminate the possible proximity of parts of structures that have remained under tension.
V.A.T. will be carried out using a dedicated and standardized device:
- Downstream of the separation in order to verify it.
- Just before the structure on which we intervene in order to verify the identification, to check the absence of residual energy, and not to risk a short circuit during MALT/CC
In case of multiple sources, this procedure must be carried out for each source
Although technically, V.A.T. can be carried out using a simple voltmeter, it must be done using a V.A.T. for the following reasons:
- Quality of the cords
- Isolated touch points
- Impossibility of bad adjustment
- Addition of magnetic detection allowing detection with one touch
MALT/CC is the ultimate protection:
- It causes a short circuit to be interrupted in the event of accidental recharging
- It provides a discharge circuit in case of release of residual energy, in case of induced voltage, or in case of lightning
The MALT/CC must be carried out:
- Upstream of the work (work that may lead to the separation of a part of the structure)
- Close to the structure
- If possible, in permanent visual control
- In case of multiple sources, a MALT/CC must be carried out between each source and the structure (the work on the structure can in fact separate a part of it from the first MALT/CC)
- The MALT/CC tooling must be proportionate to the section of the circuits concerned
The MALT/CC star should be installed in the following order:
- Installing the ground socket
- Installing active circuit sockets
This prevents the MALT/CC tooling from ending up at a potential other than ground in the event of a voltage.
MALT/CC is optional in B.T.A. if:
- no risk of induced tension;
- no risk of automatic recharging;
- no capacitors;
- no long cable
The consignment certificate includes in particular:
- The identification of the site
- The identification of the work to be recorded
- The identification of the Consignment Manager (who completes the certificate and signs)
- The identification of the Project Manager (who receives the work certificate)
- The nature of the work
- The date of consignment
The Construction Manager (B2/H2) will only be able to undertake the work upon receipt of the consignment certificate.
It is a piece of writing: signed by both parties because it defines vital responsibilities.
If it is physically impossible to deliver by hand, the consignment certificate may be sent by collated message:
- The author has filled out a consignment certificate
- He reads it to the receiver
- The receiver copies it
- The receiver repeats each piece of information
- The mode of communication is notified
The consignment is carried out by the Consignment Manager who carried out the consignment of the work in question (unless responsibility is transferred in writing to a new Consignment Manager).
The Consignment Manager can dissign as soon as the Construction Manager gives him the notice of the end of work. (No cancellation on oral request)
The Project Manager must first have:
- Gathered the stakeholders to inform them of the end of the work
- Have removed the safety devices (except for the deposit itself!)
- Have put away the equipment
- Put the structures back in working order (without re-energizing)
The Consignment Manager can unsign as soon as the Construction Manager gives him theNotice of completion of work. (No cancellation on oral request)
In the case where the work is carried out in successive phases:
This allows an intermediate restart in 2 phases of work.
The Construction Manager is interrupting work:
- He gives the Consignment Manager, a Notice of interruption of work (and gives him back the consignment certificate).
- The Consignment Manager can then unsign.
- When the work resumes, the Construction Manager will only be able to intervene after consignment by the Consignment Manager (and delivery of the consignment certificate).
For example, let's say that the Project Manager has received a work order for:
- M952 engine replacement. (First phase)
- Replacement of the KM22 contactor. (Second phase)
The steps will be as follows:
- Work order from the operator to the Construction Manager
- Consignment by the Consignment Manager and delivery of the consignment certificate to the Construction Manager
- First phase work.
- Delivery of a notice of interruption of work and return of the consignment certificate by the Construction Manager to the Consignment Manager
- Unconsignment by the Consignment Manager
Subsequently, upon resumption of work:
- Consignment again by the Consignment Manager and return of the consignment certificate to the Construction Manager
- Second phase work
- Delivery of a notice of completion of work and return of the consignment certificate by the Construction Manager to the Consignment Manager
- Unconsignment by the Consignment Manager
It is sometimes interesting to carry out the consignment in 2 phases:
- In the case of an operation that does not have any electrician (the operator has his Consignment Manager consigned and the work subcontracted)
- In case the Consignment Manager is a non-electrician.
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