Power Distribution Units (Distros)
**********************************

This SOP defines the standards and procedures for preparing, deploying, operating, and resetting
**power distribution units (distros)** used by Maryland Productions (MP) and Event Revolution (RV).
Distros serve as the controlled interface between high-capacity power sources and show-critical
equipment and must be configured and monitored carefully.

Improper distro use can result in equipment damage, tripped breakers, or unsafe conditions.


Purpose
=======

- Ensure safe and reliable power distribution to all departments.
- Standardize distro configuration and labeling.
- Prevent overloads, phase imbalance, and nuisance tripping.
- Provide predictable power layouts across shows.
- Protect MP/RV power equipment and connected systems.


Who This SOP Is For
===================

- Power technicians  
- Technical Directors  
- Department leads interfacing with power  
- Warehouse staff prepping distros  
- Authorized freelancers approved for power work  

Only trained and authorized personnel may configure or modify distro systems.


Scope
=====

This SOP applies to:

- Main power distros
- Breakout and spider-box style distros
- Rack-mounted power distribution
- Temporary power panels
- Generator-fed and venue-fed distro systems

Permanent electrical installations are excluded.


Power Distro Safety Rules
=========================

- Treat all distro outputs as live when energized.
- Never exceed breaker or connector ratings.
- Never bypass breakers or safety devices.
- Keep distro panels closed during operation.
- Do not reconfigure live systems.
- Stop immediately if abnormal behavior is observed.

Safety overrides speed and convenience.


Warehouse Prep & Inspection
===========================

Before deployment:

- Inspect enclosures for damage.
- Verify:
  - Input connector type and rating  
  - Output connector types and ratings  
  - Breaker labeling and functionality  
- Test indicator lights and meters where applicable.
- Confirm distro configuration matches job requirements.
- Pack with required feeder, tails, and accessories.
- Label cases clearly.

Distros must leave the warehouse fully functional and documented.


Distro Configuration Standards
==============================

Input Configuration
-------------------

- Verify correct input type:
  - Camlock feeder  
  - L21-30  
  - 14-50  
- Confirm voltage and phase match source.
- Never adapt inputs without approval.

Input errors cause immediate failures.


Output Configuration
--------------------

- Assign outputs by department:
  - Lighting  
  - Audio  
  - Video  
- Separate noisy or high-draw loads when possible.
- Avoid mixing critical systems on shared breakers.
- Label outputs clearly.

Logical layouts simplify troubleshooting.


Load Planning & Phase Balance
=============================

- Calculate expected loads before energizing.
- Balance loads evenly across phases.
- Monitor neutral load where applicable.
- Leave headroom for startup and peak loads.

Poor load planning causes tripping and instability.


Deployment & Placement
======================

- Place distros:
  - On stable, dry surfaces  
  - Away from foot traffic  
  - With clear access for monitoring  
- Protect from weather and spills.
- Maintain clear working space around panels.

Distro placement affects safety and access.


Energization Procedure
======================

- Verify all outputs are off or disconnected.
- Confirm feeder connections are correct.
- Communicate before energizing.
- Energize input source.
- Bring outputs online deliberately.
- Observe meters and indicators.

Energize methodically, not all at once.


Operation & Monitoring
======================

During operation:

- Monitor:
  - Breaker status  
  - Voltage indicators  
  - Load meters  
- Check for heat, smell, or noise.
- Respond immediately to tripped breakers.
- Investigate cause before re-energizing.

Never reset a breaker repeatedly.


Common Distro Issues
====================

- Tripped breakers due to overload
- Phase imbalance
- Loose output connections
- Mis-labeled circuits
- Incompatible connectors

Most issues trace back to planning or labeling errors.


Strike & Reset
==============

- Power down all loads.
- De-energize input source.
- Disconnect feeder following proper order.
- Inspect distro and cables during strike.
- Note any issues or damage.
- Reset breakers to default state.

Strike is part of the inspection process.


Handling & Storage
==================

- Transport distros in proper cases.
- Protect meters and panels.
- Keep connectors capped where applicable.
- Store in designated power equipment areas.

Good handling extends distro service life.


Roles & Responsibilities
========================

Power Technicians
-----------------

- Configure and monitor distro systems.
- Verify load balance and safety.
- Respond to power issues.

Warehouse Staff
---------------

- Inspect, test, and prep distros.
- Maintain labeling and accessories.

Project Managers
----------------

- Ensure proper power scope and staffing.
- Support safety-driven decisions.


Quality Control
===============

- Distros inspected before and after use.
- Loads planned and balanced.
- Outputs labeled clearly.
- Issues documented and addressed.

Reliable power distribution protects every department.