Safety, environmental and professional practices

Technical knowledge gets a technician through the door; professional practice keeps them there. This lesson covers the parts of IT support that are not about making a computer work: keeping yourself and others safe around electrical equipment, protecting components from damage, handling batteries and electronic waste responsibly, controlling the environment equipment runs in, respecting licences and privacy, and communicating with users in a way that builds trust. CompTIA calls these operational procedures, and they make up a large share of the Core 2 exam, because employers value them as highly as technical skill.

Electrical safety

Computer equipment runs on mains power, 120 volts in both Canada and the United States, which can kill. Inside a desktop the voltages are low once the power supply has converted them, but the power supply itself, monitors, and anything connected to mains wiring are dangerous. A few rules keep technicians safe. Shut down and unplug equipment before opening it; switching off is not enough, because many power supplies keep part of the motherboard powered while plugged in. Never open a power supply, a monitor or a UPS: they contain capacitors that can hold a dangerous charge long after unplugging, and they are replaced, not repaired, in normal IT support. Remove jewellery such as rings and watches when working inside equipment. Keep liquids away from the bench. Inspect power cables and power strips for damage, and replace them rather than taping them up. Never daisy-chain power strips, plugging one into another, which overloads the first strip and the outlet.

Equipment should be properly grounded, which means its metal case is connected through the plug's third pin to the building's earth, so that a fault sends current safely to ground rather than through a person. Never remove the ground pin or use an adapter that defeats it. In kitchens and cafes, where water and electricity meet, outlets near sinks are protected by ground-fault devices, called GFCIs in both countries, that cut power within a fraction of a second if current leaks to ground. The cafe counter where Ridgeline's tablets and receipt printer sit is close to the espresso machine and the sink, so Sam made sure the counter outlets are protected, and that cables run where spilled drinks cannot reach the power strip.

Batteries carry their own risks. Lithium-ion batteries can catch fire if punctured, crushed, overheated or charged when damaged, and such fires are hard to put out. A swollen or damaged battery must be removed from service, kept away from anything flammable, ideally in a metal container or a bucket of sand, and taken to a proper recycling point. Never throw lithium batteries in the garbage or the regular recycling, where they cause fires in collection trucks and sorting plants.

Protecting equipment: ESD

Lesson 3 introduced electrostatic discharge. Static builds up on people as they move, especially in dry winter air, and a discharge of a few hundred volts, far below what you can feel, can damage or weaken sensitive components. Weakened components are the worst outcome, because they may work for weeks before failing intermittently, producing faults that are very hard to diagnose. The defences are simple: an anti-static wrist strap connected to the equipment's metal chassis or to an anti-static mat that is itself grounded; anti-static bags for storing and carrying components; handling cards and modules by their edges; and avoiding carpets and synthetic clothing at the workbench. Touching bare metal on the case before handling parts helps, but it is no substitute for a strap.

Lifting and the workplace

Moving equipment injures more technicians than electricity does. Printers, UPS units and monitors are heavier than they look. Lift with your legs, keeping your back straight and the load close to your body; do not twist while carrying; and get help or a trolley for anything heavy or awkward. A common guideline is that loads above about 23 kilograms, or 50 pounds, need two people or a lifting aid, but the right limit depends on the person, the shape of the load and the distance; employers' health and safety programs set the actual rules. Keep cables off floors and out of walkways, or cover them with cable protectors, because trip hazards cause injuries in offices and cafes alike.

Chemicals appear in IT work too: isopropyl alcohol for cleaning, compressed gas dusters, thermal paste and printer toner. Each comes with a safety data sheet, SDS, describing its hazards, safe handling, first aid and disposal. Canada's workplace hazard system is WHMIS and the US system is OSHA's Hazard Communication Standard; both are aligned with the Globally Harmonized System, so the pictograms and sheet sections look the same. Toner is a very fine powder that should not be breathed in or blown about with compressed air; spills are cleaned with a toner vacuum, not an ordinary vacuum cleaner, which can let the particles through or even ignite them.

The environment equipment runs in

Computers like cool, dry, clean air. High temperatures shorten component life and cause throttling and shutdowns; high humidity causes condensation and corrosion, while very dry air increases static. Dust clogs fans and heat sinks and, mixed with coffee-shop grease, coats boards in a sticky film. The roasting room, warm, dusty and full of chaff from the roasting process, is a hostile place for ROAST-LT, which is why Sam has it cleaned every few months and keeps it on a raised stand rather than the floor, where dust collects.

Power quality matters as much as air quality. A surge protector protects against short voltage spikes from lightning and switching. An uninterruptible power supply, a UPS, goes further: its battery keeps equipment running through short power cuts and gives time to shut down safely in longer ones, and most models also condition the power, smoothing out sags and spikes. Ridgeline's UPS-01 protects OFFICE-01, the NAS, the network switch and the router, so that a power flicker does not corrupt the NAS or drop the internet connection. The UPS connects to the NAS by USB and tells it to shut down cleanly if the battery runs low.

A UPS is rated in volt-amperes, VA, and in watts. The watt rating is the one to compare with the equipment's power draw, and good practice is to load a UPS to no more than about 80 in 100 of its watt rating. Runtime depends on the load: the lighter the load, the longer the battery lasts, and the maker publishes a runtime chart for each model.

ups_watts = 900          # UPS-01 is rated 1500 VA / 900 W
devices = {"OFFICE-01": 120, "OFFICE-NAS": 35, "NET-SW": 15, "NET-RTR": 20}

load = sum(devices.values())
share = load / ups_watts
print("Total load:", load, "W")
print(f"Load on the UPS: {share * 100:.0f} in 100 of its watt rating")
print("Within the 80 in 100 guideline" if share <= 0.8 else "Too much load for this UPS")

Total load: 190 W
Load on the UPS: 21 in 100 of its watt rating
Within the 80 in 100 guideline

devices = {"OFFICE-01": 120, "OFFICE-NAS": 35, "NET-SW": 15, "NET-RTR": 20}

def ups_ok(ups_watts, loads):
    return True

def spare_watts(ups_watts, loads):
    return 0

print(ups_ok(900, devices), spare_watts(900, devices))

Laser printers are a special case: their fusers draw large bursts of power when warming up, so they should never be plugged into the battery outlets of a typical office UPS. That is why OFFICE-MFP is on a surge protector instead.

Disposal and the environment

Electronic equipment contains valuable metals and hazardous substances, such as lead and mercury, and must not go to landfill. In Canada, most provinces run extended producer responsibility programs for electronics, funded by fees on new equipment, with free drop-off depots; in British Columbia, Ridgeline uses the provincial electronics recycling program. In the United States, about half the states have electronics recycling laws, and elsewhere certified recyclers and manufacturer take-back schemes fill the gap. Batteries go to battery recycling points, such as those run by Call2Recycle in both countries. Toner and ink cartridges can usually be returned to the maker.

Before any device leaves the business for recycling, donation or resale, its data must be destroyed. Deleting files or formatting a drive does not remove the data, which recovery tools can often restore. Hard drives are wiped with tools that overwrite every sector, or physically destroyed by drilling or shredding; SSDs are erased with the drive's built-in secure erase command, or destroyed, because overwriting does not reliably reach every flash cell. A drive encrypted with BitLocker from the start, as all Ridgeline's drives are, is much easier to retire safely, because destroying the key makes the data unreadable. Certified data destruction companies provide a certificate of destruction for the records.

Licences, privacy and policies

Software is licensed, not owned. A licence agreement sets out how the software may be used: on how many computers or by how many users, for what purposes, and for how long. Most business software is now sold by subscription, per user per month, as Microsoft 365 is; some is licensed per device or by perpetual licence. Open-source software comes with licences that allow free use and modification under conditions. Installing unlicensed software exposes a business to legal claims and often to malware, since pirated software is a common carrier. Technicians install only properly licensed software and keep licence records with the inventory.

Technicians also handle personal information constantly: customer names and addresses in the shipping system, employee records on the bookkeeping computer, email in every mailbox. Privacy law limits how personal information is collected, used and protected. Canada's federal law for private-sector organizations is PIPEDA, and some provinces, including British Columbia and Alberta, have their own similar laws; in the United States, privacy is covered by a patchwork of federal laws for particular sectors and a growing number of state privacy laws. Card payments are governed by the Payment Card Industry Data Security Standard, PCI DSS, in both countries, which is one reason Ridgeline uses card readers that encrypt card data before it ever reaches the tablets. The practical rules for a technician are the same everywhere: access personal information only when the job requires it, never copy it to personal devices, report anything that looks like a breach immediately, and keep what you see confidential.

Organizations write down their rules in policies, and technicians should know them: an acceptable use policy for staff computers and internet access, a password and multi-factor authentication policy, a policy for staff using their own phones for work, and procedures for incidents. Ridgeline's policies fit on a few pages, which is about right for a business of its size.

Professional conduct

Users judge IT support as much by how they are treated as by whether the problem is fixed. Be on time, or call ahead if you will be late. Dress appropriately for the workplace. Listen to the user's description without interrupting, then summarize it back to confirm you understood. Use plain language rather than jargon, and explain what you are doing and why. Avoid distractions such as personal phone calls while working with a user. Never belittle a user or their question, and do not argue; if a user is angry, stay calm, acknowledge their frustration and focus on what you can do. Respect their privacy and property: do not browse their files, read their screen beyond what the task needs or move things on their desk without asking.

Set and manage expectations. Tell users how long a repair will take and what will happen next, and if it takes longer, tell them before they have to ask. When a repair cannot be done on the spot, offer options, such as a loan laptop or a workaround. Follow up afterwards to make sure the problem stayed fixed. And document everything: ticket notes, changes made, parts used and time spent. Documentation protects the technician, the user and the business when questions arise later, and it is how a small team like Sam and Jordan keeps track of a whole business's technology.